CN103135318B

CN103135318B - Change camera lens, camera and camera arrangement

Info

Publication number: CN103135318B
Application number: CN201210506102.1A
Authority: CN
Inventors: 中田康一
Original assignee: Olympus Imaging Corp
Current assignee: Olympus Corp
Priority date: 2011-12-02
Filing date: 2012-11-30
Publication date: 2015-08-05
Anticipated expiration: 2032-11-30
Also published as: CN103135318A; JP2013117613A; JP5904773B2

Abstract

The invention provides and change camera lens, camera and camera arrangement.The fine adjustment of the focus near focusing position can be carried out with good operability, and the drived control of high-precision focus lens can be carried out.This camera arrangement is formed by changing camera lens and can installing the camera body changing camera lens, and change camera lens and have: the 1st focusing lens head group, it has the 1st image planes amount of movement relative to unit drive volume; 2nd focusing lens head group, it has the 2nd image planes amount of movement relative to unit drive volume less than the 1st image planes amount of movement; And lens driving control part, it is when by when operating MF operating portion under changing state that camera lens is arranged on camera body, select the 1st focusing lens head group or the 2nd focusing lens head group according to the instruction from camera body, the operation according to MF operating portion carries out drived control to the 1st selected focusing lens head group or the 2nd focusing lens head group.

Description

Change camera lens, camera and camera arrangement

Technical field

The present invention relates to be made up of phtographic lens and camera body that phtographic lens can be installed camera arrangement, replacing camera lens on camera body and camera can be arranged on.

Background technology

In recent years, the progress of image documentation equipment is remarkable, particularly in camera field, carry out digitizing by the silver film of photographing to image is replaced with imaging apparatus, thus replaced optical profile type view finder in the past and carry the display monitor or electronic viewfinder (EVF) that make use of liquid crystal panel or organic EL etc. gradually.

But, when above-mentioned display monitor or EVF, display light quantity and can the reverse side of the advantage such as composition easily in visual confirmation photographic picture is regulated when there is all shot object images that can be presented at imaging on imaging apparatus and at night photography etc., there is shortcoming as described below: compare with the optical profile type view finder etc. be mounted on single-lens reflex camera, owing to being difficult to the trickle change knowing focus, therefore there is the shortcoming of the focusing be difficult to when carrying out manual focus (MF) accurately.

As the method addressed this is that, propose to have and by push-botton operation and focusing ring operation, the method shown is amplified to a part for the image be presented on display monitor or EVF when carrying out MF operation.

[prior art document]

[patent documentation]

[patent documentation 1] Japanese Unexamined Patent Publication 11-298791 publication

[patent documentation 2] Japanese Unexamined Patent Publication 2010-51037 publication

But, when scheme disclosed in above-mentioned patent documentation 1 and patent documentation 2 is exaggerated display image when MF operates, because the drived control method of focus lens is identical with when not amplifying, therefore the confirmation of focusing state is easily carried out, but when image planes change is relative to focus lens movement highly sensitive, there is the problem being difficult to the trickle focusing carried out near focusing position.

In addition, in the lens construction of the focus lens that the sensitivity that image planes change adopting operability when making the fine adjustment of carrying out focus preferential is low, when defocus amount is large, produce the problem compared with spended time till making focus lens move near focusing position.

And, when carrying out auto-focusing (AF) in the phtographic lens of the highly sensitive focus lens using image planes as above to change of having to, same when also operating with MF, the difficulty of the drived control of the focus lens near focusing position is high, exists and is difficult to perform the problems such as high-precision AF controls and the AF control time is elongated.

Summary of the invention

The object of the invention is to, solve the problem, providing can with good operability to carry out the fine adjustment of the focus near focusing position and can carry out the replacing camera lens of the drived control of high-precision focus lens, camera and camera arrangement.

The replacing camera lens of the 1st invention, it can be arranged on camera body, and this replacing camera lens has: the 1st focusing lens head group, and it has the 1st image planes amount of movement relative to unit amount of movement; 2nd focusing lens head group, it has the 2nd image planes amount of movement less than the 1st image planes amount of movement relative to unit amount of movement; MF operating portion, it is for carrying out manual focus; Lens driving control part, it is when operating described MF operating portion, select described 1st focusing lens head group or described 2nd focusing lens head group, the operation according to described MF operating portion carries out drived control to selected described 1st focusing lens head group or described 2nd focusing lens head group.

The camera of the 2nd invention, it has multiple focusing lens head group, and this camera has: the 1st focusing lens head group, and it has the 1st image planes amount of movement relative to unit amount of movement; 2nd focusing lens head group, it has the 2nd image planes amount of movement less than the 1st image planes amount of movement relative to unit amount of movement; MF operating portion, it is for carrying out manual focus; And lens driving control part, it is when operating described MF operating portion, select described 1st focusing lens head group or described 2nd focusing lens head group, the operation according to described MF operating portion carries out drived control to selected described 1st focusing lens head group or described 2nd focusing lens head group.

The camera arrangement of the 3rd invention, it is formed with the camera body can installing this replacing camera lens by changing camera lens, described camera body has and can carry out with described replacing camera lens the camera body control part that communicates, described replacing camera lens has: the 1st focusing lens head group, and it has the 1st image planes amount of movement relative to unit amount of movement; 2nd focusing lens head group, it has the 2nd image planes amount of movement less than the 1st image planes amount of movement relative to unit amount of movement; MF operating portion, it is for carrying out manual focus;

Department of Communication Force, it communicates with described camera body; Lens driving control part, when described replacing camera lens is arranged on operate described MF operating portion under the state on described camera body time, this lens driving control part receives the instruction from camera body control part by described Department of Communication Force, select described 1st focusing lens head group or described 2nd focusing lens head group according to this instruction, the operation according to described MF operating portion carries out drived control to selected described 1st focusing lens head group or described 2nd focusing lens head group.

The camera arrangement of the 4th invention, it is formed with the camera body can installing this replacing camera lens by changing camera lens, and described replacing camera lens has: the 1st focusing lens head group, and it has the 1st image planes amount of movement relative to unit amount of movement, 2nd focusing lens head group, it has the 2nd image planes amount of movement less than the 1st image planes amount of movement relative to unit amount of movement, and lens driving control part, it carries out the drived control of described 1st focusing lens head group or described 2nd focusing lens head group according to the instruction from described camera body, described camera body has focus detection part, this focus detection part detects the focus condition of described 1st focusing lens head group and described 2nd focusing lens head group and calculates focusing position, described lens driving control part drives described 1st focusing lens head group to the focusing position indicated from described camera body, and the side-play amount calculated between the stop position of the described 1st focusing lens head group caused by the driving resolution of described 1st focusing lens head group and focusing position, the driving of described 2nd focusing lens head group is carried out according to calculated described side-play amount.

Invention effect

According to the present invention, can provide can with good operability to carry out the fine adjustment of the focus near focusing position and can carry out the replacing camera lens of the drived control of high-precision focus lens, camera and camera arrangement.

Accompanying drawing explanation

Fig. 1 is the block diagram of the configuration example of the camera arrangement that one embodiment of the present invention is shown.

Fig. 2 is the electrical diagram of the configuration example of the camera arrangement that one embodiment of the present invention is shown.

Fig. 3 is the process flow diagram of an example of the process of the camera arrangement that one embodiment of the present invention is shown.

Fig. 4 is the process flow diagram of an example of the process of the camera arrangement that one embodiment of the present invention is shown.

Fig. 5 is the sequential chart of the example that the replacing camera lens of one embodiment of the present invention and the synchronous communication of camera body are shown.

Fig. 6 is the process flow diagram of an example of the process of the MF Operational Figure Of Merit setting of the camera arrangement that one embodiment of the present invention is shown.

The figure of one example of the drive actions of focusing lens head group when Fig. 7 is the MF pattern of the camera arrangement that one embodiment of the present invention is shown.

Fig. 8 is the process flow diagram of an example of the AF process of the camera arrangement that one embodiment of the present invention is shown.

Fig. 9 is the figure of an example of the AF action of the camera arrangement that one embodiment of the present invention is shown.

Figure 10 is the process flow diagram of an example of the process of the MF Operational Figure Of Merit setting of the camera arrangement that one embodiment of the present invention is shown.

Figure 11 is the figure of an example of the structure of the imaging apparatus of the camera arrangement that one embodiment of the present invention is shown.

Figure 12 is the process flow diagram of AF process one example of the camera arrangement that one embodiment of the present invention is shown.

Figure 13 is the figure of an example of the camera arrangement AF action that one embodiment of the present invention is shown.

Symbol description

100 camera arrangements

101 camera bodies

102 camera control circuit

103 imaging apparatuss

104 focal plane shutters

105 display monitors

106 flashlamp

107 release-pushes

108 batteries

121 main body CPU(BCPU)

122 nonvolatile memories (FROM)

123 storeies (RAM)

124 imaging apparatus control circuits

125 image processing circuits

126 shutter control circuits

127 display circuits

128 flash control circuits

129 operating switch testing circuits

130 power circuits

131 main body telecommunication circuits

132 the 1st release-pushes (1R switch)

133 the 2nd release-pushes (2R switch)

135 control programs

201 change camera lens

202 lens control circuits

203 high image planes sensitivity focusing lens head groups (high sensitivity lens group)

204 low image planes sensitivity focusing lens head groups (muting sensitivity lens group)

205 apertures

206 manual focus focusing rings (MF ring)

221 camera lens CPU(LCPU)

222 FROM

223 RAM

224 high image planes sensitivity focusing lens driving circuits (high sensitivity lens driving circuit)

225 high image planes sensitivity focusing lens position detecting circuits (high sensitivity lens location testing circuit)

226 low image planes sensitivity focusing lens driving circuits (muting sensitivity lens driving circuit)

227 low image planes sensitivity focusing lens position detecting circuits (muting sensitivity lens location testing circuit)

228 aperture driving circuits

229 MF operation detection circuit

231 camera lens telecommunication circuits

235 lens datas

Embodiment

Below, with reference to accompanying drawing, while be described in detail to embodiments of the present invention.

Fig. 1 is the camera arrangement about one embodiment of the present invention, will change block diagram when camera lens is arranged on camera body.Camera arrangement 100 is made up of camera body 101 and replacing camera lens 201.

Camera body 101 comprises camera control circuit 102, imaging apparatus 103, focal plane shutter 104, display monitor 105, flashlamp 106, release-push 107 and battery 108 etc. and forms.

Camera control circuit 102 controls imaging apparatus 103, focal plane shutter 104 operation of release-push 107 according to cameraman.In addition, carry out by lens control circuit 202 described later the various drived control changing camera lens 201.And, carry out the light emitting control of flashlamp 106 and the display and control of the display monitor 105 corresponding with various camera operation as required.

Imaging apparatus 103 is made up of CCD or cmos sensor etc., carries out the shooting of the shot object image of imaging in imaging surface by changing camera lens 201.

Focal plane shutter 104 by corresponding with the operation of release-push 107, from camera control circuit 102 instruction and carry out on-off action, thus carry out the exposure actions for imaging apparatus 103.

Display monitor 105 is made up of liquid crystal or organic EL etc., carry out when photographing standby and dynamic image photography time show live view image display (so-called live view) of the image exported from imaging apparatus 103 in real time, or according to cameraman to the operation of not shown reproduction button and various setting operation parts display reproduction image and set information etc.

Flashlamp 106 according to corresponding with the operation of cameraman to release-push 107, from the instruction of camera control circuit 102, use the electric charge that is accumulated in not shown illuminating capacitor and synchronously carry out light-emission operation with the exposure actions in focal plane shutter 104.

Release-push 107 is for by being operated by cameraman, thus makes to have installed on camera body 101 functional unit that the camera arrangement changing camera lens 201 performs the photographing actions such as AE, AF, exposure.

Battery 108 is for the power supply to camera body 101 and replacing camera lens 201 supply power.

On the other hand, change camera lens 201 to be configured to comprise: lens control circuit 202, high image planes sensitivity focusing lens head group 203(the 1st focusing lens head group, hereinafter referred to as high sensitivity lens group), low image planes sensitivity focusing lens head group 204(the 2nd focusing lens head group, hereinafter referred to as muting sensitivity lens group), aperture 205 and manual focus ring (hereinafter referred to as MF ring) 206 etc.

Lens control circuit 202 carries out the drived control etc. of high sensitivity lens group 203, muting sensitivity lens group 204 and aperture 205 according to the instruction from camera control circuit 102, and according to cameraman, the operation of MF ring 206 is carried out to the drived control of high sensitivity lens group 203, muting sensitivity lens group 204.

In addition, image planes sensitivity represents the inverse of the ratio of the amount of movement of focusing lens group and the amount of movement of image planes correspondingly, higher relative to the image planes amount of movement larger image planes sensitivity of the unit amount of movement of focusing lens head group.Therefore, high sensitivity lens group 203 has the 1st image planes amount of movement relative to unit amount of movement, and muting sensitivity lens group 204 has the 2nd image planes amount of movement relative to unit amount of movement, and the 2nd image planes amount of movement is the numerical value less than the 1st image planes amount of movement.

High sensitivity lens group 203 is driven by the instruction of lens control circuit 202, moves and regulate the focus condition changing camera lens 201 in the moving range that the group shot shadow distance range with optical axis direction is corresponding.

Muting sensitivity lens group 204 is driven by the instruction of lens control circuit 202, moves and regulate the focus condition changing camera lens 201 centered by precalculated position in the preset range of optical axis direction.

Aperture 205 is driven by the instruction from lens control circuit 202, makes aperture area change and the subject light quantity of subtend camera body 101 direction incidence regulates.

MF ring 206 is the functional units with the structure can rotated centered by optical axis.When having carried out the rotation process of MF ring 206 by cameraman, to the direction corresponding with rotation process and with the drive volume corresponding with rotation process, high sensitivity lens group 203, muting sensitivity lens group 204 are driven by the instruction of lens control circuit 202, thus carry out manual focus action.MF ring 206 forms a part for MF operating portion.

With reference to Fig. 2, the electrical structure of the camera arrangement 100 of present embodiment as above is described.Fig. 2 is the block diagram of an example of the electrical structure of the camera arrangement that present embodiment is shown, illustrates and the camera control circuit 102 shown in Fig. 1 and lens control circuit 202 are expanded into electrical module respectively.

The Inner Constitution of camera body 101 is that the main body CPU121(of the control comprising responsible camera arrangement 100 entirety is hereinafter referred to as BCPU).On BCPU 121, the nonvolatile memory 122(FROM such as flash rom of control program 135 etc. be connected with the main body telecommunication circuit 131 for being carried out with camera lens CPU 221 by telecommunication circuit 231 described later communicating, storing BCPU 121), temporarily store the storeies 123 such as the RAM of the various information of BCPU 121.

In this case, by by BCPU 121 executive control program 135, thus realize illustrative control action in each process flow diagram described later.

And, BCPU 121 is connected with imaging apparatus control circuit 124 and image processing circuit 125, this imaging apparatus control circuit 124 controls imaging apparatus 103 to obtain view data, and this image processing circuit 125 carries out implementing the image procossing such as A/D conversion and filtering process to the picture signal that exports from imaging apparatus 103 and the view data being stored as photographs generates and gone out radio-frequency component by high-pass filtering process from the image data extraction in focus detection region and calculate AF(auto-focusing) process of evaluation of estimate etc.AF evaluation of estimate represents the evaluation of estimate to focal power suitable with the contrast of shot object image.

And, BCPU 121 is connected with shutter control circuit 126 that focal plane shutter 104 carries out controlling, for the flash control circuit 128 photographed image and various photographic information being presented at display circuit 127 on display monitor 105, control flashlamp 106, the operating switch testing circuit 129 detected various operating switch state, the smoothing being used for the voltage carrying out loaded battery 108 and boosting etc. and to the power circuit 130 of camera arrangement 100 supply power.

Operating switch testing circuit 129 is connected with the various operating switchs of the camera body 101 that cameraman carries out operating, be such as connected with switch camera arrangement 100 photograph mode not shown change-over switch and by the operation of release-push 107 release-push etc. of action.

Release-push in present embodiment is made up of 2 general stage switches, and BCPU 121 performs the action control corresponding with the state of each switch detected by operating switch testing circuit 129.When by partly pressing of release-push the 1st release-push 132(hereinafter referred to as 1R switch) become on-state time carry out focus detection and light-metering, changing the focusing lens 202,203 of camera lens 201 is become focusing state by driving.And, when by entirely pressing of release-push the 2nd release-push 133(hereinafter referred to as 2R switch) connect time, focal plane shutter 104 is exposed by driving.

The Inner Constitution changing camera lens 201 is that the camera lens CPU 221(of the control comprised in responsible replacing camera lens 201 is hereinafter referred to as LCPU).

LCPU 221 is connected with FROM 222, RAM 223, high image planes sensitivity focusing lens driving circuit is (following, be called high sensitivity lens driving circuit) 224, high image planes sensitivity focusing lens position detecting circuit is (following, be called high sensitivity lens location testing circuit) 225, low image planes sensitivity focusing lens driving circuit is (following, be called muting sensitivity lens driving circuit) 226, low image planes sensitivity focusing lens position detecting circuit is (following, be called muting sensitivity lens location testing circuit) 227, aperture driving circuit 228, MF operation detection circuit 229 and camera lens telecommunication circuit 231 etc.

LCPU 221 carries out the various drived control such as lens driving or aperture driving, and by camera lens telecommunication circuit 231, main body telecommunication circuit 131 and communicating with BCPU 121, receiving action order, sends the lens data 235 etc. such as camera lens operating state, the optical data be stored in FROM 222 changing camera lens 201.In addition, LCPU222 forms a part for lens driving control part.

High sensitivity lens driving circuit 224 is configured to comprise actuator and the motor drivers etc. such as stepper motor, drives high sensitivity lens group 203 in the direction of the optical axis.

High sensitivity lens location testing circuit 225 is configured to comprise optical chopper (PI) circuit etc., the rotation amount of the driving motor be included in high sensitivity lens driving circuit 224 is converted to umber of pulse by this optical chopper (PI) circuit, utilizes the umber of pulse of the reference positions such as the unlimited end of distance to represent the absolute position of high sensitivity lens group 203.High sensitivity lens location testing circuit 225 carries out by high sensitivity lens driving circuit 224 and the position of driven high sensitivity lens group 203 is detected.

Muting sensitivity lens driving circuit 226 is configured to comprise actuator and the motor drivers etc. such as stepper motor, drives muting sensitivity lens group 204 in the direction of the optical axis.

Muting sensitivity lens location testing circuit 227 is configured to comprise PI circuit etc., the rotation amount of the driving motor be included in muting sensitivity lens driving circuit 226 is converted to umber of pulse by this PI circuit, utilizes the umber of pulse of the reference positions such as distance movable range end to represent the absolute position of muting sensitivity lens group 204.Muting sensitivity lens location testing circuit 227 carries out by muting sensitivity lens driving circuit 226 and the position of driven muting sensitivity lens group 204 is detected.

Aperture driving circuit 228 is configured to comprise actuator and the motor drivers etc. such as stepper motor, the MF operation detection circuit 229 that the mouth-opening action carrying out aperture 205 controls is configured to comprise the position detecting circuit be made up of linear encoder and PI circuit etc., detects sense of rotation and the rotation amount of the MF ring 206 corresponding with the operation of cameraman.

Camera lens telecommunication circuit 231 has the communication connection terminal being located at and changing camera lens 201 outside, receive from the focusing lens head group 203,204 of BCPU121 and the driving order etc. of aperture 205, send lens location information, operating state, lens data etc. to BCPU 121.

Fig. 3 is the process flow diagram of the process that BCPU 121 is shown.

When the power supply of camera body 101 is connected, BCPU 121 processes from step S101.

In step S101, BCPU 121 judges whether to be provided with replacing camera lens 201 by detecting not shown installation on off state, in uninstalled situation, carries out regular installation and detects the motor-driven work of wait until install.In standby, when the rendering operation etc. of the image of the alter operation and photography in the past that have been carried out photographic parameter by cameraman, the action indicated by execution.When the installation changing camera lens 201 being detected in step S101, BCPU 121 enters into step S102.

In step s 102, BCPU 121 is communicated with LCPU221 by main body telecommunication circuit 131, camera lens telecommunication circuit 231, obtains the lens datas such as optical data 235 such as action parameter, chromatic aberation data of focusing lens head group 203,204 etc. and is stored in RAM123.

In step s 103, BCPU 121 is started synchronous communication with LCPU221 by main body telecommunication circuit 131, camera lens telecommunication circuit 231 and is transferred to synchronous communication pattern, afterwards, obtain camera lens status data in each synchronizing cycle and perform the control action corresponding with camera lens state.In addition, the details for synchronous communication will describe later.

In step S104, BCPU 121 makes imaging apparatus 103 action by imaging apparatus control circuit 124 in each synchronizing cycle and obtains view data.Further, by the instruction of BCPU 121, obtained view data is implemented to the image procossing of live view image display in image processing circuit 125, on display monitor 105, started the display of live view image by display circuit 127.

In step S105, BCPU 121 is detected by the confirmation of the camera lens status data that utilizes synchronous communication to obtain and not shown installation on off state, whether is provided with the detection changing camera lens 201.Further, when having taken off replacing camera lens 201, having got back to step S101, having entered into step S106 when having installed.

In step s 106, whether BCPU 121, with reference to the not shown power switch of camera body 101, detects power supply and is switched on.Further, entering into step S107 when power supply disconnects, entering into step S108 when connecting.

In step s 107, BCPU 121 performs predetermined the ending process such as cut-out process of the preservation of various data, homing action, power-supply system.

In step S108, BCPU 121 judges that focal modes is MF pattern or AF pattern, enters into step S109, enter into step S111 when AF pattern when MF pattern.

In step S109, BCPU 121 carries out the MF Operational Figure Of Merit setting process of the Operational Figure Of Merit for setting MF ring 206, and setting operates corresponding sensitivity with MF.About the details of MF Operational Figure Of Merit setting process, will describe later.

In step s 110, BCPU 121 indicates the setting of MF pattern to LCPU 221 by synchronous communication, and specifies the sensitivity corresponding with the result that the MF Operational Figure Of Merit of step S109 sets to set.When the setting indicating MF pattern, pattern setting instruction also can be omitted.

In step S111, BCPU 121 indicates the setting of AF pattern to LCPU 221 by synchronous communication.When the setting indicating AF pattern, pattern setting instruction also can be omitted.

In step S112, BCPU 121 detects 1R switch 132 by operating switch testing circuit 129 and whether is in on-state.Further, detecting that 1R switch 132 enters into step S113 when being in on-state, step S105 is got back to when being in off-state.In addition, MF action during MF pattern be from above-mentioned steps S105 through step S108(Y) and to step S112(N) cycle for the treatment of in perform.

In step S113, BCPU 121 judges that focal modes is MF pattern or AF pattern.Further, enter into step S114 when AF pattern, enter into step S115 when MF pattern.

In step S114, BCPU 121 carries out communicating while perform AF action with LCPU 221.AF action is carried out the action of position maximum for the radio-frequency component extracted from photographed view data as focusing position, so-called AF mode of climbing the mountain.Or, carry out the action of phase differential AF mode, calculating the defocus amount obtained according to being arranged on phase offset on imaging apparatus 103, that receive the output of the multipair AF pixel of the object beam of the different pupil location through changing camera lens 201, according to calculated defocus amount, drived control being carried out to focusing lens 203.

In step sl 15, BCPU 121 carries out communicating with LCPU 221 while perform the light-metering action that still image photographs.As light-metering action, according to the output of imaging apparatus 103 and the brightness value obtained in picture and Luminance Distribution carry out exposure computing.In addition, BCPU 121, when focal modes is AF pattern, carries out above-mentioned light-metering action concurrently with the AF action of step S114.

In step S116, whether BCPU 121 is in off-state according to the testing result Lai Pan Do 1R switch 132 of operating switch testing circuit 129.Further, enter into step S120 when being determined as 1R switch 132 and becoming off-state, be determined as be on-state time enter into step S117.

In step S117, according to the testing result of operating switch testing circuit 129, BCPU 121 differentiates whether 2R switch 133 becomes on-state.Further, enter into step S118 when being determined as 2R switch 133 and being in on-state, be determined as be off-state time get back to step S116.

In step S118, BCPU 121 carries out shooting action.First BCPU 121 according to the exposure operation result of the light-metering action of step S115, communicates with LCPU 221, the stop down action of instruction aperture 205.Further, after completing stop down action, BCPU 121 by control for the instruction of imaging apparatus control circuit 124, shutter control circuit 126 imaging apparatus 103, focal plane shutter 104 and perform shooting action.And the image pickup signal exported from imaging apparatus 103 is converted to view data by BCPU 121 indicating image treatment circuit 125.

In step S119, the view data obtained in step S118 is stored into the foreign medium such as RAM123 or compact flash by BCPU 121.In addition, make display monitor 105 perform the display of photographs by display circuit 127 simultaneously.

In the step s 120, BCPU 121 carries out the initialization of focus marks and the removing etc. of photographs display by display circuit 127, thus after the display setting of display monitor 105 is live view image display, gets back to step S105 and transfer to photography holding state.

Fig. 4 is the process flow diagram of an example of the process of the LCPU 221 illustrated in the replacing camera lens 201 of one embodiment of the present invention.

In step s 201, when the power supply of camera body 101 is connected, when starting power supply supply by not shown installation power supply contact to replacing camera lens 201, LCPU 221 carries out the initial setting actions such as the homing action of focusing lens head group 203,204 and aperture 205.

In step S202, LCPU 221 is communicated with BCPU 121 by camera body telecommunication circuit 131, camera lens telecommunication circuit 231.Further, according to the request of BCPU 121, the lens data 235 of the optical data such as action parameter, chromatic aberation data of the focusing lens head group 203,204 be stored in FROM 222 etc. etc. is sent to BCPU 121.

In step S203, LCPU 221 is started to carry out synchronous communication with BCPU121 by main body telecommunication circuit 131, camera lens telecommunication circuit 231 and is transferred to synchronous communication pattern.Afterwards, in each synchronizing cycle, the camera lens status data be stored in RAM 223 is sent to BCPU 121.In addition, detailed about synchronous communication, will describe later.

In step S204, MF when being carried out operation and the MF pattern of the release-push 107 of camera body 101 by cameraman operates, and determines whether the instruction having carried out the driving performing focusing lens head group 203,204 from BCPU 121 to LCPU 221.LCPU 121, being judged to have carried out entering into step S205 when driving the instruction performed, enters into step S206 when being judged to be the instruction not carrying out driving execution.

In step S205, LCPU 221 performs according to the driving from BCPU 121 drived control that high sensitivity lens group 203, muting sensitivity lens group 204 are carried out in instruction.Now, LCPU 221, by high sensitivity lens driving circuit 224, muting sensitivity lens driving circuit 226, high sensitivity lens location testing circuit 225, muting sensitivity lens location testing circuit 227, carries out the drived control of focusing lens head group 203,204.In addition, detailed about the lens driving process performed in step S205, will describe later.

In step S206, according to the information of synchronous communication, LCPU 221 differentiates whether focal modes is AF pattern, enters into step S212 when being AF pattern, enters into step S207 when not being AF pattern.

In step S207, LCPU 221 determines whether by MF operation detection circuit 229 operation having carried out MF ring 206.The detection of the operation of MF ring 206 be such as by the position of rotation that differentiates the MF ring 206 detected in each operation detection timing by MF operation detection circuit 229 whether relative on once detect position and there occurs change and carry out.

In addition, in order to carry out the driving of focusing lens head group 203,204 described later, sense of rotation and the location variation (rotation amount) of now also obtaining MF ring 206 store.

In step S208, LCPU 221 enters into step S209 when the operation having carried out MF ring 206 being detected by step S207, enters into step S212 when not detecting.

In step S209, LCPU 221 differentiates whether the Operational Figure Of Merit of the MF ring 206 indicated from BCPU 121 by synchronous communication is muting sensitivity, enters into step S210, enter into step S211 when high sensitivity when muting sensitivity.

In step S210, LCPU 221, by muting sensitivity lens driving circuit 226, muting sensitivity lens location testing circuit 227, carries out the driving of muting sensitivity lens group 204 according to the sense of rotation detected in step S207 and rotation amount.

In step S211, LCPU 221, by high sensitivity lens driving circuit 224, high sensitivity lens location testing circuit 225, carries out the driving of high sensitivity lens group 203 according to the sense of rotation detected in step S207 and rotation amount.

In step S212, LCPU 221 is confirmed whether to have received from BCPU 121 to stop from camera body 101 to the instruction changing camera lens 201 supply power, entering into step S213 when have received the instruction stopping power supply supply, getting back to step S204 when not receiving.

Herein, when focal modes is set to MF pattern, from step S204(N) through step S206(N), enter into step S210 or step S211 to carry out MF action (lens driving) from step S207.Further, from step S212(N) enter into step S204, repeatedly perform this cycle for the treatment of.

In addition, when focal modes is set to AF pattern, repeatedly perform step S204(Y), S205, S206(Y), S212(N) cycle for the treatment of, carry out AF action (lens driving) by step S205.

In step S213, current location storage, homing action etc. that LCPU 221 carries out focusing lens head group 203,204 and aperture 205 as required end process.

Fig. 5 is the sequential chart of the example that the replacing camera lens 201 of one embodiment of the present invention and the synchronous communication of camera body 101 are shown, is described the synchronous communication of BCPU 121 and LCPU 221 according to Fig. 5.

In synchronous communication, except the instruction of communication, the synchronizing signal of camera lens communication, i.e. camera lens communication synchronization signal (e), with predetermined period, such as identical with the vertical synchronizing signal (b) of shooting cycle, are sent to LCPU 221 by BCPU 121.

In addition, the lens location that BCPU 121 sends the timing of the positional information obtaining focusing lens head group 203,204 indicates to LCPU 221 obtains signal (f).

BCPU 121 makes lens location obtain the state change of signal (f) in predetermined timing.Such as, as shown in Figure 5, in the savings action of the imaging apparatus 103 shown in shooting/reading operation (c), when have passed through imaging apparatus central portion the savings time 1/2 when, make lens location obtain signal (f) state change.LCPU 221 obtains the positional information of the timing acquisition focusing lens head group 203,204 of the state change of signal (f) at lens location.

LI(g is processed in replacing camera lens) in, the acquisition of the positional information of focusing lens head group 203,204 is carried out in the timing obtaining the state change of signal (f) at lens location, the mode of operation of MF ring 206 detects and the driving etc. of the focusing lens head group 203,204 corresponding with detected mode of operation.

Treatments B 1(a in camera body) in, utilize the view data obtained in previous frame to the calculating etc. of the display and AF evaluation of estimate of carrying out live view image.

The BL of camera lens communication shown in (d) is for obtaining the camera lens status data request instruction being sent to the camera lens status data of LCPU 221 from BCPU 121.

L2(g is processed in replacing camera lens) in, LCPU 221 is according to the camera lens status data request instruction BL(d received from BCPU 121) request, by camera lens status data LB(d such as the positional information of focusing lens head group 203,204 and the modes of operation of MF ring 206) be sent to BCPU 121.

Treatments B 2(a in camera body) in, the camera lens status data LB(d according to being obtained by camera lens state communication), judgement near focusing when carrying out AF computing, MF pattern, various setting are changed.A series of communication operation described above is synchronous with camera lens communication synchronization signal (e) and repeatedly perform.

Fig. 6 is the process flow diagram of the process that the subroutine " setting of MF Operational Figure Of Merit " performed by BCPU 121 is shown.According to Fig. 6, the concrete example of the process of " setting of MF Operational Figure Of Merit " shown in the step S109 of Fig. 3 is described.

In the process of " setting of MF Operational Figure Of Merit ", BCPU 121 is according to the change of the AF evaluation of estimate obtained by the view data obtained in each frame, and whether the position of carrying out high sensitivity lens group 203 is positioned at the judgement near focusing position.Further, select any one party in high sensitivity lens group 203 and muting sensitivity lens group 204 according to result of determination and carry out MF action (lens driving).

In step S131, BCPU 121 indicating image treatment circuit 125 carries out the calculating of AF evaluation of estimate according to the view data obtained, and obtains AF evaluation of estimate.

In step S132, BCPU 121 is according to representing that the maximum value maximum value of AF evaluation of estimate being detected detects mark and differentiates whether maximum value detected.Further, BCPU 121 enters into step S133 when maximum value not detected, enters into step S139 when maximum value being detected.In addition, maximum value detects when mark is installed on camera body 101 with replacing camera lens 201 when the power supply of camera body 101 is connected and is eliminated.

In step S133, BCPU 121 differentiates whether the AF evaluation of estimate obtained is maximum value.BCPU 121 according to the positional information of the AF evaluation of estimate obtained with time series and high sensitivity lens group 203 this to data, differentiate whether the AF evaluation of estimate obtained is maximum value.Further, BCPU 121 be determined as be maximum value time enter into step S134.

In step S134, the maximum value detected is set as maximal value D1 by BCPU 121, detects mark arrange maximum value.In step S135, set the decision content D2 calculated with predetermined relationship according to maximal value D1.In addition, in step S133, BCPU 121 be determined as be not maximum value time enter into step S138.

Herein, Fig. 7 is used to be described AF evaluation of estimate and the relation between maximal value D1, the relation of decision content D2 and the position of AF evaluation of estimate and focusing lens head group.

In the figure 7, the AF evaluation of estimate (maximal value of AF evaluation of estimate) that D1 is the position of focusing lens head group 203,204 when being focusing position, Dj be for regulation by the location determination of focusing lens head group 203,204 be scope near focusing position focusing position near judgement scope, D2 represent from the maximal value D1 of AF evaluation of estimate deduct judge the value after scope Dj near focusing position focusing position near decision content.

In addition, when LP1 illustrates and regards focusing lens head group 203,204 as a lens group, become the lens location of focusing, lens location when LP2 represents that the focusing lens head group 203,204 AF evaluation of estimate being become decision content D2 near focusing position regards a lens group as.

Then, get back to the process flow diagram of the process of " setting of MF Operational Figure Of Merit " of Fig. 6, proceed explanation.

In step S136, obtained AF evaluation of estimate and decision content D2 compare by BCPU 121, be judged to not to be included in focusing position environs and enter into step S137 when AF evaluation of estimate is less than decision content D2.On the other hand, BCPU 121, when AF evaluation of estimate is more than decision content D2, is judged to be included in focusing position environs and enter into step S142.

In step S137, be judged to be it is not near focusing position due to BCPU 121, therefore the value of maximal value D1 removed, and maximum value detection mark is removed.

As mentioned above, in MF action, less than decision content D2 near focusing position and when being judged to not to be near focusing position, the value of maximal value D1 is removed in AF evaluation of estimate.Afterwards, in step S133, when the maximum value of AF evaluation of estimate again being detected, this maximum value is set as new maximal value D1.

In step S138, the focusing lens head group that the operation by MF ring 206 drives by BCPU 121 is set as high sensitivity lens group 203.

In step S142, the focusing lens head group that the operation by MF ring 206 drives by BCPU 121 is set as muting sensitivity lens group 204.

On the other hand, BCPU 121 detects mark to maximum value and arranges in step S132, be determined as maximum value detected time, in step S139, differentiate whether AF evaluation of estimate is greater than the maximal value D1 set.

In step S139, BCPU 121 enters into step S136 when being judged to be that AF evaluation of estimate is not greater than maximal value D1, determines whether near focusing position.

On the other hand, BCPU 121 enters into step S140 when being judged to be that AF evaluation of estimate is greater than maximal value D1, in step S140, up-to-date AF evaluation of estimate is updated to maximal value D1.

Further, in step s 141, BCPU 121 upgrades decision content D2 near focusing position according to the maximal value D1 upgraded.As mentioned above, the detection of the maximal value D1 performing AF evaluation of estimate is continued in MF pattern, be judged to be the position of focusing lens head group 203,204 be near focusing position during, upgrade decision content D2 near maximal value D1 and focusing position when new maximal value being detected at every turn.

Further, BCPU 121 thinks according to the situation that AF evaluation of estimate is maximal value the scope be positioned near focusing position, thus enters into step S142.Further, in step S142, the focusing lens head group that the operation by MF ring 206 drives by BCPU 121 is set as muting sensitivity lens group 204.

Then, according to Fig. 7, the example of MF action of the action of the process flow diagram processed based on " setting of MF Operational Figure Of Merit " shown in Fig. 6 and the operation that comprises cameraman is described.

When MF pattern, cameraman should be focused by MF action, and the 1st rotation process of rotation process is carried out in the direction of carrying out to focusing position to MF ring 206.

LD1 represents the MF action to focusing position direction based on above-mentioned 1st rotation process, therefore such as represents the drive actions of high sensitivity lens group 203.Now, the action making high sensitivity lens group 203 from the closely direction movement of side of the unlimited side direction in the direction as focusing position is shown.Further, when proceeding MF action, high sensitivity lens group 203 moved focusing position LP1, became the action that AF evaluation of estimate exceedes maximal value D1.

Cameraman observes display monitor 105, by making the contrast of display image exceed the situation of peak value and identify and move focusing position according to the 1st rotation process of MF ring 206, then carry out the 2nd rotation process rotated in the opposite direction by MF ring 206.

As shown in Figure 7, the position of the focusing lens head group before this reversion action is between LP1 and LP2, and AF evaluation of estimate to be correspondingly included near focusing position in judgement scope Dj.Therefore, be judged to be near focusing position in the step S136 of the MF Operational Figure Of Merit determination processing shown in Fig. 6.So in step S142, BCPU121 performs muting sensitivity setting, and the focusing lens head group driven by the rotation process by MF ring 206 is muting sensitivity lens group 204 from high sensitivity lens group 203 change setting.

LD2 represents according to above-mentioned 2nd rotation process, makes muting sensitivity lens group 204 from the closely unlimited side of side direction to the action of movement.Further, when proceeding MF action further, muting sensitivity lens group 204 moved focusing position LP1, became the action that AF evaluation of estimate exceedes maximal value D1.

Cameraman observes the live view image be presented on display monitor 105, and according to the 2nd rotation process of MF ring 206, again exceed peak value to the contrast of the display image of display monitor 105, the situation moving focusing position identifies.Further, cameraman carries out the 3rd rotation process to carrying out rotation process in the other direction to MF ring 206.

LD3 represents according to above-mentioned 3rd rotation process, makes muting sensitivity lens group 204 move from the direction of unlimited side direction closely side and arrive the action of focusing position LP1.As shown in Figure 7, the AF evaluation of estimate corresponding with the position of the focus lens group before this reversion action (LD3) to be included near focusing position in judgement scope Dj, is judged to be near focusing position.Therefore, in step S142, BCPU 121 performs muting sensitivity setting, and the focusing lens head group driven by the rotation process of MF ring 206 is maintained muting sensitivity lens group 204 and do not change.

As mentioned above, when MF action, judge whether focusing lens head group is positioned near focusing position, carries out the focusing utilizing muting sensitivity lens group 204 when being positioned near focusing position.Thus, due to the image planes amount of movement of the operational ton relative to MF ring 206 can be reduced, therefore, it is possible to improve focusing accuracy further, and operability when focusing is finely tuned can be improved further.

Fig. 8 is the process flow diagram that " AF " performed in the step S114 of Fig. 3 processes.When adopting mountain-climbing AF mode as AF mode, by image processing circuit 125, the radio-frequency component of the picture signal exported from imaging apparatus 103 is extracted as AF evaluation of estimate, the position of carrying out the focusing lens head group this AF evaluation of estimate being become maximum value is set to the control of focusing position.

In step S150, BCPU 121 and LCPU 221 carry out synchronous communication, indicate mobile high sensitivity lens group 203 in AF action and carry out the high sensitivity setting of focusing action.

In step S151, BCPU 121 and LCPU 221 carry out synchronous communication, and instruction makes the beginning of the scanning motion of focusing lens head group movement.In addition, scanning motion is performed by LCPU 221 in the step S205 of Fig. 4.

In step S152, the picture signal that BCPU 121 exports according to being made a video recording by imaging apparatus 103, is obtained the AF evaluation of estimate that calculated by image processing part 125 and stores.

In step S153, BCPU 121 according to stored AF evaluation of estimate, with correspond to AF evaluation of estimate and the multipair data of the position data of focusing lens head group that obtained by synchronous communication by LCPU 221, judge whether AF evaluation of estimate has exceeded maximum value.Further, BCPU 121 enters into step S154 when having exceeded maximum value, enters into step S159 when not exceeding maximum value.

In step S154, BCPU 121 and LCPU 221 carry out synchronous communication, the stopping of beacon scanning action.

On the other hand, in step S159, BCPU 121 and LCPU 221 carry out synchronous communication, obtain the information whether focusing lens head group reaches mobile boundary.Further, enter into step S160 when reaching mobile boundary, carrying out can not check processing and terminate AF process.

In addition, getting back to step S152 when not reaching mobile boundary, repeatedly carrying out the acquisition of the AF evaluation of estimate in scanning motion until exceed maximum value.

In step S155, BCPU 121, by the interpolation processing etc. of the position data based on the AF evaluation of estimate before and after the maximum value of AF evaluation of estimate and focusing lens head group correspondingly, calculates the focusing position corresponding with the genuine maximum value of AF evaluation of estimate.

In step S156, BCPU 121 communicates with LCPU 221, indicates and high sensitivity lens group 203 is driven to focusing position.Now, high sensitivity lens group 203 is driven into from focusing position to front lateral deviation from the position of scheduled volume as described later.In addition, focusing position drive actions is performed by LCPU 221 in the step S205 of Fig. 4.

In step S157, BCPU 121 communicates with LCPU 221, indicates the muting sensitivity of the focusing action carrying out mobile muting sensitivity lens group 204 in AF action to set.

In step S158, BCPU 121 communicates with LCPU 221, again indicates and muting sensitivity lens group 204 is moved to focusing position and terminate AF process.

About the movement of the focusing lens head group in the AF process performed as mentioned above, further describe according to Fig. 9.

Fig. 9 illustrates by the change (a) of image planes position X direction caused as the movement of the high sensitivity lens group 203 of image planes position and the figure of the change (b) of image planes position that caused by the movement of muting sensitivity lens group 204.

In fig .9, when the driving having been carried out becoming for detecting AF evaluation of estimate the turntable driving of the focusing position LP1 of maximum value by BCPU 121 couples of LCPU 221 performs instruction (step S151), LCPU 221 pairs of high sensitivity lens group 203 drive (LDs).Herein, Ps illustrates the driving resolution of high sensitivity lens group 203.

Further, the maximum value (step S153:Y) of AF evaluation of estimate detected when the position of high sensitivity lens group 203 has exceeded focusing position LP1, the position of LP3 stops turntable driving (step S154).Further, BCPU121 detects focusing position LP1(step S155 according to AF evaluation of estimate).BCPU 121 indicates LCPU 221 to perform driving (step S156) to the focusing position LP1 detected, and high sensitivity lens group 203 is driven into indicated position from the position of LP3 by LCPU 221.

But, as shown in Figure 9, the driving resolution Ps due to high sensitivity lens group 203 relation and drive create skew in stop position and focusing position time, be driven into stop position LPc(LDo: the step S156 of the front closest to the focusing position corresponding with driving resolution Ps).

Further, muting sensitivity lens group 204 is driven the difference component (LDw: step S158) between the driving stop position LPc of high sensitivity lens group 203 and focusing position LP1.Pw represents the driving resolution of muting sensitivity lens group 204.About the image planes amount of movement of muting sensitivity lens group 204, because image planes sensitivity is lower, therefore relevant with the amount of movement of the identical lens group of optical axis direction, also less than the image planes amount of movement of high sensitivity lens group 203.Therefore, resolution Pw represents the value less than resolution Ps.

As mentioned above, in order to the error caused the driving resolution Ps by high sensitivity lens group 203 corrects, the correction carrying out muting sensitivity lens group 204 drives (LDw), can carry out more high-precision focusing.

In addition, about the order of the driving to focusing position of focusing lens head group 203,204, although adopt order successively, also can be simultaneously.By performing simultaneously, thus the driving time of focusing lens head group can be shortened, can microfilming time delay.

In addition, in the above description, about the margin of error that the driving resolution by high sensitivity lens group 203 causes, the driving carrying out muting sensitivity lens group 204 corrects.But, also can be applied to and such as, be corrected by other factors, the error caused by the spatial frequency characteristic of photographic optical system and the error etc. that caused by the mechanical deflection comprising camera body 101.Specifically as shown below.The error cause the spatial frequency characteristic by photographic optical system and the error etc. caused by the mechanical deflection comprising camera body 101, be prestored to camera body 101 and change in the FROM 122,222 of camera lens 201.Further, also can carry out the driving of muting sensitivity lens group 204 according to the drive volume of the error information the whole margins of error calculated that are obtained each factor by BCPU 121 or LCPU 221, thus above-mentioned error is corrected.

As mentioned above, driven by the drive volume being muting sensitivity lens group 204 by the slight error composition conversion relevant with focusing, thus this error percentage can be removed to carry out high-precision focusing action.

As described above, the camera arrangement of the 1st embodiment of the present invention can carry out the fine adjustment of the focus near focusing position with good operability when MF, and can carry out the drived control of high-precision focus lens when AF.

In addition, although the 1st embodiment of the present invention is depicted as the camera arrangement be made up of replacing camera lens and camera body, the one-piece type camera of camera lens phtographic lens and camera body are integrally constituted can be also applied to.

Figure 10 is the process flow diagram of the process of the BCPU 121 illustrated in the camera arrangement of the 2nd embodiment of the present invention.

About the 2nd embodiment, omit about the explanation with the 1st embodiment same section, only different parts is described.According to Figure 10, the process of " setting of MF Operational Figure Of Merit " corresponding with Fig. 4 of the 1st embodiment is described.

In step S161, BCPU 121 enters into step S167 when the live view image display on the display monitor 105 of camera body 101 is exaggerated display, enters into step S162 when usually showing.The switching that the usual display can manually carrying out live view image by cameraman by the push-botton operation etc. of camera body 101 shows with amplification.In addition, also can when the operation of MF ring 206 being detected and in step S136(Fig. 6) in when being judged to be near focusing position, automatically carry out amplification by BCPU 121 and show.

In step S162, BCPU 121 judges photograph mode whether as macro mode, entering into step S167, entering into step S163 when being pattern in addition when being macro mode.About the setting of macro mode, can be set by the mode selection menu of camera body 101.In addition, also can be detected by LCPU 221 and change the operation that the MF ring 206 of camera lens 201 and macro mode set button etc., its information is sent to BCPU 121 as camera lens status data, set macro mode by BCPU 121.

In step S163, BCPU 121 judges that whether current photography multiplying power is larger than predetermined photography multiplying power, enters into step S167, when less than predetermined photography multiplying power, enter into step S164 when larger than predetermined photography multiplying power.About the judgement of the size of photography multiplying power, carry out in such a way.Such as, obtain the subject range data corresponding with the position of current focusing lens by synchronous communication from changing camera lens 201 and change the focal length data of camera lens 201 as camera lens status data, calculating photography multiplying power by their ratio.Further, whether the photography multiplying power calculated by judgement is larger than predetermined photography multiplying power, such as 1/30 times.

In addition, camera lens CPU 221 also can calculate photography multiplying power according to the subject range data corresponding with the position of current focusing lens and focal length data, and these photography multiplying power data are sent to BCPU 121 by synchronous communication as camera lens status data.

In step S164, BCPU 121 differentiates that whether the F value of current replacing camera lens is less than predetermined value, enters into step S167, when larger than predetermined value, enter into step S165 when less than predetermined value.

In step S165, BCPU 121 judges focal modes whether as AF+MF pattern, entering into step S167, entering into step S166 when pattern in addition when being AF+MF pattern.AF+MF pattern is in execution AF action and after focusing, allows the focal modes of the manual focus action corresponding with the rotation process of cameraman to MF ring 206.It is the focal modes used when focal position is changed a little by cameraman from the state utilizing AF action to focus.

In step S166, the focusing lens head group that the operation by MF ring 206 drives is set as high sensitivity lens group 203 by BCPU 121.

In step S167, the focusing lens head group that the operation by MF ring 206 drives is set as muting sensitivity lens group 204 by BCPU 121.

As described above, in the camera arrangement of the 2nd embodiment of the present invention, when MF pattern, when expecting the camera state of more high-precision focusing, select muting sensitivity lens group 204 to perform the focusing corresponding with the operation of MF ring 206.

Expect that the camera state of more high-precision focusing is such as the situation of the photograph mode (pattern) that the allowable depth that is focused is less than common photograph mode.Thus, the position control of high-resolution focusing lens head group is carried out owing to can be converted by image planes, therefore, it is possible to carry out more high-precision manual focus action.Specifically, the situation of macro mode that to be situation, photograph mode that the live view image display of display monitor 105 is exaggerated display be, situation that photography multiplying power is larger than predetermined multiplying power, situation that F value is less than predetermined value, focal modes are the situation of AF+MF pattern to the situation expecting the camera state of more high-precision focusing.

Then, the variation of the 2nd embodiment of the present invention is described.

Also can replace the process of step S162 and carry out following process.Change not shown mode setting part camera lens 201 having and can set the pattern changing camera lens, be provided with macro mode setting button (not shown).The not shown switch that LCPU 221 reference group installs in macro mode setting button detects whether be set with macro mode.Further, LCPU 221 when detect set macro mode time, the focusing lens head group that also operation by MF ring 206 can be driven is set as muting sensitivity lens group 204.

In addition, also can replace the process of step S163 and carry out following process.Camera lens CPU 221 calculates photography multiplying power according to the subject range data corresponding with the position of current focusing lens and focal length data.Further, the focusing lens head group that the operation by MF ring 206 also can drive when these photography multiplying power data are larger than predetermined value by camera lens CPU 221 is set as muting sensitivity lens group 204.

In addition, also can replace the process of step S164 and carry out following process.Camera lens CPU 221 obtains the current F value changing camera lens.Further, camera lens CPU 221 also can when this F value be less than predetermined value, and the focusing lens head group operation by MF ring 206 driven is set as muting sensitivity lens group 204.In above variation, also can obtain the effect identical with the 2nd embodiment of the present invention.

In addition, other variation of the 2nd embodiment of the present invention are below shown.In this variation, the data representing pattern are sent from BCPU121 to LCPU 221, LCPU 221 differentiates pattern, and the focusing lens group selection operation by MF ring 206 driven is any one party in high sensitivity lens group 203 and muting sensitivity lens group 204.

Such as, also can replace step S161, S167 and carry out following process.The live view image represented on the display monitor 105 of camera body 101 display is that the pattern data of amplifying display or display are usually sent to LCPU 221 by BCPU 121.Further, LCPU 221 is when showing for carrying out amplification according to sent pattern data judging, and the focusing lens head group operation by MF ring 206 driven is set as muting sensitivity lens group 204.

In addition, also can replace step S162, S167 and carry out following process.BCPU 121 determines whether by the mode selection menu of camera body 101 and setting photograph mode is set as macro mode, and these pattern data are sent to LCPU 221.LCPU 221 according to sent pattern discriminating data for setting macro mode time, the focusing lens head group operation by MF ring 206 driven is set as muting sensitivity lens group 204.

In other above variation, also can obtain the effect identical with the 2nd embodiment of the present invention.

In addition, although the 2nd embodiment of the present invention is depicted as the camera arrangement be made up of replacing camera lens and camera body, also can be applied on the one-piece type camera of the camera lens that phtographic lens and camera body are integrally constituted.

Then, the 3rd embodiment of the present invention is described.

3rd embodiment adopts mountain-climbing AF mode relative in the 1st embodiment as AF mode, and difference is to have employed phase differential AF mode.About the 3rd embodiment, omit about the explanation with the 1st embodiment same section, only different parts is described.

First, according to Figure 11, the structure of the imaging apparatus for carrying out phase differential AF mode is described.The enlarged schematic partial view in the pixel portion of one example of the imaging apparatus 103 that Figure 11 uses when being and illustrating and carry out phase differential AF in camera arrangement of the present invention.

Imaging apparatus 103 has: be configured in multiple pixel in imaging surface and the pack-shot lens 301 that arrange corresponding to pixel to be condensed to respectively by object beam; For the photography pixel 302 of making a video recording to shot object image when usually photographing; For taking the benchmark AF pixel 303 of in order to phase differential AF, object beam having been carried out to a shot object image after pupil segmentation; And the reference AF pixel 304 of another shot object image after pupil segmentation has been carried out in shooting to object beam in order to phase differential AF.

Read multiple benchmark AF pixel 303 and the output with reference to AF pixel 304, calculating phase differential by image processing circuit 125 according to exporting by the pixel of two multiple kinds the picture signal formed, obtaining focusing position according to calculated phase differential and focusing.

Then, according to the process flow diagram of Figure 12, " AF " process performed in the step S114 of Fig. 3 is described.

In step S170, BCPU 121, according to multiple benchmark AF pixel 303 and the output with reference to AF pixel 304, obtains the phase differential calculated by image processing circuit 125.

In step S171, BCPU 121 is according to obtained phase difference calculating focusing position.In step S172, BCPU 121 and LCPU 221 carry out synchronous communication, indicate mobile high sensitivity lens group 203 in AF action and carry out the high sensitivity setting of focusing action.

In step S173, BCPU 121 performs in front of the focusing position that high sensitivity lens group 203 to be moved on the position of the front of focusing position described later and drives.

In step S174, BCPU 121 and LCPU 221 carry out synchronous communication, indicate mobile muting sensitivity zoom lens group 204 in AF action and carry out the muting sensitivity setting of focusing action.

In step S175, BCPU 121 performs as described later and muting sensitivity lens group 204 is driven to the focusing position of focusing position movement.

Figure 13 illustrates in phase differential AF mode, by change (a) and the figure of the change (b) of image planes position that caused by the movement of muting sensitivity lens group 204 of image planes position X direction caused as the movement of the high sensitivity lens group 203 of image planes position.

When having carried out from BCPU 121 couples of LCPU 221 performing instruction to the driving of position, the front LPc not crossing calculated focusing position (step S173), high sensitivity lens group 203 has been driven into (LDd: step S205) on position, the front LPc of focusing position by LCPU 221 as indicated.

About the stop position of the driving of high sensitivity lens group 203, owing to having predetermined resolution Ps, therefore between stop position and focusing position, produce deviation.Therefore, be driven into and do not cross focusing position, and the stop position LPc of front closest to focusing position.This is because once cross focusing position, need to driving focusing lens head group in the other direction, existence has produced recoil error factors and has reduced the problem of AF precision.

And, by the instruction (step S175) that the focusing position of BCPU 121 drives, muting sensitivity lens group 204 is measured (LDw: step S205) to the difference (LPc-LP1) between the stop position and focusing position of the direction driving high sensitivity lens group 203 of focusing position by LCPU 221.Because the resolution of the stop position of muting sensitivity lens group 204 is higher than the resolution of the stop position of high sensitivity lens group 203, therefore, it is possible to make focusing lens head group be positioned at position closer to focusing position.

As mentioned above, in order to the error caused the driving resolution by high sensitivity lens group 203 corrects, the correction carrying out muting sensitivity lens group 204 drives (LDw), can carry out more high-precision focusing.

In addition, about the driving order of focusing lens head group 203,204 to focusing position, although adopt the order of carrying out successively, also can be simultaneously.By performing thus the driving time of focusing lens head group can be shortened simultaneously, can microfilming time delay.

In addition, in the above description, about the margin of error that the driving resolution by high sensitivity lens group 203 causes, the driving of muting sensitivity lens group 204 is carried out.But, also can be applied to the error etc. that other factors, the error such as caused by the spatial frequency characteristic of photographic optical system and the skew by the machinery comprising camera body 101 cause and correct.Specifically as shown below.The error cause the spatial frequency characteristic by photographic optical system and the error etc. caused by the skew of the machinery comprising camera body 101 are stored in advance in camera body 101 and change in the FROM 122,222 of camera lens 201.Further, also can carry out the driving of muting sensitivity lens group 204 according to the drive volume of the error information the whole margins of error calculated that are obtained each factor by BCPU 121 or LCPU 221, above-mentioned error is corrected.

As described above, according to the 3rd embodiment of the present invention, in order to correct the error that the driving resolution by high sensitivity lens group 203 causes when AF action, the correction carrying out muting sensitivity lens group 204 drives, and can carry out more high-precision focusing.

As mentioned above, the present invention has the highly sensitive focusing lens head group of image planes and the low focusing lens head group of image planes sensitivity, under the state driving two focusing lens head groups to carry out the replacing camera lens of focusing to be installed on camera body according to focusing action, when having carried out manual focus operation by cameraman, normally drive the focusing lens head group that image planes are highly sensitive, under the condition of focusing trickle with needs near focusing position, drive the focusing lens head group that image planes sensitivity is low.

In addition, in such a configuration, when the execution instruction operation having been carried out auto-focusing by cameraman, drive the highly sensitive focusing lens head group of image planes and the low focusing lens head group both sides of image planes sensitivity, and the focusing lens head group driving image planes sensitivity low, in the mode corrected apart from the side-play amount of focusing position caused driving resolution and the stop position error by the highly sensitive focusing lens head group of image planes, thus high-precision auto-focusing can be carried out.

And, when photograph mode is dynamic graphical pattern, the highly sensitive focusing lens head group of image planes is driven in the turntable driving of carrying out for detecting focusing position and moving when corresponding tracking drives with the image planes that the relative distance with subject and camera change, the low focusing lens head group of image planes sensitivity be in order to detect subject state change and carry out near focusing position small round driving waving driving grade time driven.

That is, the camera arrangement of embodiments of the present invention can carry out the fine adjustment of the focus near focusing position with good operability when MF, and can carry out the drived control of high-precision focus lens when AF.

Although embodiments of the present invention illustrate as the camera arrangement be made up of replacing camera lens and camera body, also at camera lens phtographic lens and camera body are integrally constituted, one-piece type camera can apply the present invention.

In addition, the present invention is not limited to illustrative structure in the above-described embodiment, can certainly carry out various change in the scope not departing from its main idea.In addition, about the motion flow in claims, instructions and accompanying drawing, even if conveniently use " first ", " then " etc. to be illustrated, do not mean that yet and must implement according to this order.

Claims

1. change a camera lens, it can be arranged on camera body, and this replacing camera lens has:

1st focusing lens head group, it has the 1st image planes amount of movement relative to unit amount of movement;

2nd focusing lens head group, it has the 2nd image planes amount of movement less than the 1st image planes amount of movement relative to unit amount of movement;

MF operating portion, it is for carrying out manual focus;

Lens driving control part, it is when described MF operating portion is operated, select described 1st focusing lens head group or described 2nd focusing lens head group, the operation according to described MF operating portion carries out drived control to selected described 1st focusing lens head group or described 2nd focusing lens head group.

2. replacing camera lens according to claim 1, wherein,

Described replacing camera lens has the mode setting part that can set multiple pattern,

Described lens driving control part, when the pattern set by described mode setting part is set to the allowable depth pattern less than predetermined value, selects described 2nd focusing lens head group.

3. a camera, it has multiple focusing lens head group, and this camera has:

MF operating portion, it is for carrying out manual focus; And

4. camera according to claim 3, wherein,

Described camera has focus detection part, its detect described multiple focusing lens head group to focal power,

Described lens driving control part detected by described focus detection part described predetermined decision content is exceeded to focal power time select described 2nd focusing lens head group.

5. camera according to claim 4, wherein,

Described predetermined decision content is and setting explicitly the maximum value of focal power of being detected by above-mentioned focus detection part.

6. camera according to claim 3, wherein,

Described camera has the mode setting part that can set multiple pattern,

7. a camera arrangement, it is formed with the camera body can installing this replacing camera lens by changing camera lens,

Described camera body has and can carry out with described replacing camera lens the camera body control part that communicates,

Described replacing camera lens has:

MF operating portion, it is for carrying out manual focus;

Department of Communication Force, it communicates with described camera body;

Lens driving control part, when when described replacing camera lens being arranged under the state on described camera body, described MF operating portion is operated, this lens driving control part receives the instruction from camera body control part by described Department of Communication Force, select described 1st focusing lens head group or described 2nd focusing lens head group according to this instruction, the operation according to described MF operating portion carries out drived control to selected described 1st focusing lens head group or described 2nd focusing lens head group.

8. camera arrangement according to claim 7, wherein,

Described camera body has focus detection part, this focus detection part detect described 1st focusing lens head group and the 2nd focusing lens head group to focal power,

Described camera body control part described predetermined decision content is exceeded to focal power time, by described Department of Communication Force indicate described lens driving control part select described 2nd focusing lens head group.

9. camera arrangement according to claim 7, wherein,

Described camera body control part is sent to described lens driving control part by described Department of Communication Force by with the described data relevant to focal power, described lens driving control part described predetermined decision content is exceeded to focal power time select described 2nd focusing lens head group.

10. camera arrangement according to claim 8 or claim 9, wherein,

11. camera arrangements according to claim 7, wherein,

Described camera body has the mode setting part that can set multiple pattern,

Described camera body control part, when the pattern set by described mode setting part is set to the allowable depth pattern less than predetermined value, indicates described lens driving control part to select described 2nd focusing lens head group by described Department of Communication Force.

12. camera arrangements according to claim 7, wherein,

Described camera body has the mode setting part that can set multiple pattern,

The pattern set by described mode setting part is sent to described lens driving control part by described Department of Communication Force by described camera body control part, described lens driving control part, when described pattern is set to the allowable depth pattern less than predetermined value, selects described 2nd focusing lens head group.

13. 1 kinds of camera arrangements, it is formed with the camera body can installing this replacing camera lens by changing camera lens,

Described replacing camera lens has:

2nd focusing lens head group, it has the 2nd image planes amount of movement less than the 1st image planes amount of movement relative to unit amount of movement; And

Lens driving control part, it carries out the drived control of described 1st focusing lens head group or described 2nd focusing lens head group according to the instruction from described camera body,

Described camera body has focus detection part, and this focus detection part detects the focus condition of described 1st focusing lens head group and described 2nd focusing lens head group and calculates focusing position,

Described lens driving control part drives described 1st focusing lens head group to the focusing position indicated from described camera body, and the side-play amount calculated between the stop position of the described 1st focusing lens head group caused by the driving resolution of described 1st focusing lens head group and focusing position, carries out the driving of described 2nd focusing lens head group according to calculated described side-play amount.