JPS5863921A - Automatic focusing camera capable of closeup shooting - Google Patents

Automatic focusing camera capable of closeup shooting

Info

Publication number
JPS5863921A
JPS5863921A JP16370481A JP16370481A JPS5863921A JP S5863921 A JPS5863921 A JP S5863921A JP 16370481 A JP16370481 A JP 16370481A JP 16370481 A JP16370481 A JP 16370481A JP S5863921 A JPS5863921 A JP S5863921A
Authority
JP
Japan
Prior art keywords
lens
close
auxiliary
shooting
automatic focusing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP16370481A
Other languages
Japanese (ja)
Inventor
Yasuyuki Yamada
康幸 山田
Hideo Yokota
秀夫 横田
Yasuhisa Sato
泰久 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP16370481A priority Critical patent/JPS5863921A/en
Publication of JPS5863921A publication Critical patent/JPS5863921A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To realize the automatic focusing to a close-distance subject without parallax, by attaching the auxiliary lenses having the same optical axis so that they cover both a shooting lens and a distance measuring lens at one time. CONSTITUTION:An automatic focusing camera contains auxiliary lenses 2a, 5a and 6a which are attached to a shooting lens 2, a distance measuring lens 5 and a viewfinder 6 respectively for the closeup shooting. These auxiliary lenses have the optical axes coincident with the optical axis of the lens 2 and then are attached so as to cover both the lens 5 and the finder 6 at one time. Owing to the use of these auxiliary lenses, the automatic focusing is possible without causing parallax to a subject on the focal point of the auxiliary lens.

Description

【発明の詳細な説明】 本発明状近接撮影の可能な自動焦点カメラＫ１１ｌする
ものである。更に詳しく述べれば、近ＩＩＩ撮影を行な
う際撮影レンズの前向と＃１動焦点調節の為の測距用レ
ンズの前１ｉｉＫ同一の元軸を４つ補助レンズを装着し
、バララックスなしに自動焦点ｌ１１１Ｉを行なおうと
するもので、更にはファインダーの前ｍＫも補助レンズ
を装着し、ファインダー視野をも同時に変えようとする
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention is an autofocus camera K11l capable of close-up photography. More specifically, when performing near III photography, four auxiliary lenses are attached to the front of the photographic lens and the front of the distance measuring lens for #1 dynamic focus adjustment, and four auxiliary lenses are attached to the same original axis. The objective is to perform a focal point l111I, and furthermore, an auxiliary lens is attached to mK in front of the finder, and the field of view of the finder is also changed at the same time.

自動焦点カメラの接写範囲を拡大する為撮影レンズの前
面に補助レンズを装着した時、焦点の合う物体距離は補
助レンズの焦点距離によって決玄る。この場合撮影レン
ズの焦点距離は変化しても測距レンズの焦点距離は変化
しないので、近接物体への焦点調節を行なうことはでき
ない。When an auxiliary lens is attached to the front of the photographic lens to expand the close-up range of an autofocus camera, the distance to the object that is in focus is determined by the focal length of the auxiliary lens. In this case, even if the focal length of the photographing lens changes, the focal length of the distance measuring lens does not change, so it is not possible to adjust the focus on a nearby object.

ま九例え近接物体への測距が行なえるように測距レンズ
の前面に補助レンズを装着し九としても、近接物体に対
しては撮影レンズの元軸と測距レンズの元軸との関にバ
ララックスが生シル◇本発明は、上述のような従来の自
動焦点カメラがもつ近接撮影時の欠点を除去する極めて
簡便な手段を提供するものである。For example, even if an auxiliary lens is attached to the front of the distance-measuring lens to measure distances to nearby objects, the relationship between the original axis of the photographing lens and the original axis of the distance-measuring lens will be ◇The present invention provides an extremely simple means for eliminating the above-mentioned drawbacks of conventional autofocus cameras during close-up photography.

第１図、第２図は本発明を具体化し九実施例である。１
はカメラ本体、２は撮影レンズ、３はフィルム、４は自
動焦点毫ジュール、５は測距レンズ、６はファインダー
、２ｍ、５ｍ、６ｍはそれぞれ近接撮影時に撮影レンズ
２、測距レンズ５．７アイングー６に装着する補助レン
ズを表わす。FIGS. 1 and 2 show nine embodiments of the present invention. 1
is the camera body, 2 is the photographing lens, 3 is the film, 4 is the autofocus lens, 5 is the distance measuring lens, 6 is the finder, 2m, 5m, and 6m are the photographing lens 2 and the distance measuring lens 5.7 for close-up shooting, respectively. Represents the auxiliary lens attached to Aingoo 6.

第１図は無限遠物体を撮影している状態を示している。FIG. 1 shows a situation in which an object at infinity is photographed.

第１図において撮影レンズ２０党軸と一致した元軸をも
ち、自動焦点の為の測距レンズ５とファインダー６を同
時に被うような補助レンズを第２図の如く装着すること
により、補助レンズの無点上にある物体に対してバフツ
ツタスを生じることなく自動焦点調節を行なうことがで
きる。By installing an auxiliary lens as shown in Fig. 2, which has an original axis that coincides with the axis of the photographing lens 20 in Fig. 1, and which simultaneously covers the distance measuring lens 5 and viewfinder 6 for automatic focusing, as shown in Fig. 2, the auxiliary lens Automatic focus adjustment can be performed for objects located on a pointless point without causing buff-focus.

第２図において補助レンズが側光レンズをも被うように
すれば、近接撮影時の正確な側光を行なうことができる
。In FIG. 2, if the auxiliary lens also covers the side illumination lens, accurate side illumination can be achieved during close-up photography.

またＴＴＬ自動焦点カメラにおいては、撮影レンズ＃面
にのみ補助レンズを装着すれば、バラクッタスのない近
接撮影が行なえることは明らかである。Furthermore, in a TTL autofocus camera, it is clear that close-up photography without varacutus can be performed by attaching an auxiliary lens only to the # side of the photographing lens.

以上ａａＡしたように、自動焦点カメラの撮影レンズ、
ｌＩＩ距レンズ、ファインダーを同時に被うような同一
の元軸をもつ補助レンズを装着することＫより、近接撮
影時の自動焦点調節が極めて容易に行なうことができる
。As mentioned above aaA, the shooting lens of an autofocus camera,
By attaching an auxiliary lens having the same principal axis that simultaneously covers the III distance lens and the finder, automatic focus adjustment during close-up photography can be performed extremely easily.

ｔａｏｍの簡単な説明 第１図社撮影レンズ、自動焦点調節機構、ファインダー
を有する自動焦点カメラの断面図、第２Ｓａａ近接撮影
の為の補助レンズを装着した時の自動焦点カメラの断面
図である。Brief explanation of taom Figure 1: A cross-sectional view of an auto-focus camera having a photographic lens, an auto-focus adjustment mechanism, and a finder, and a cross-sectional view of the auto-focus camera when an auxiliary lens for second Saa close-up photography is attached.

１はカメラ本俸、２Ｆｉ撮影レンズ、６はフィルム、４
は自動焦点モジュール、５は測距レンズ、６はファイン
ダー、２ｍ、５ａ、６ａ紘それぞれ近接撮影時Ｋｆ＋１
影レンズ２　、　＃ｊ距レンズ５．ファインダー６に装
着する補助レンズ。1 is camera price, 2Fi shooting lens, 6 is film, 4
is an automatic focus module, 5 is a distance measuring lens, 6 is a finder, 2m, 5a, 6a Hiro each has Kf + 1 when shooting close-up.
Shadow lens 2, #j distance lens 5. Auxiliary lens attached to finder 6.

特許出願人　キャノン株式会社Patent applicant: Canon Co., Ltd.

Claims (1)

【特許請求の範囲】 １、撮影レンズ、ファインダー及び自動焦点ｉｌ１１ｗ
ｂの為の測距レンズを有するカメラにおいて、近接撮影
時に同一の元軸をもつ補助レンズが該撮影レンズと該測
距レンズを同時に被うように装着され、近接物体への焦
点調節がパララックスなしに自動的に行なわれることを
特徴とする近！Ｉ撮影の可能な自動焦点カメラ。 ２、近接撮影時に上記補助レンズはファインダーも同時
に被うようにし九特許請求の範１８第０）項記載の近接
撮影の可能な自動焦点カメラ。[Claims] 1. Photographic lens, finder, and autofocus il11w
In a camera equipped with a distance measuring lens for close-up photography, an auxiliary lens with the same principal axis is attached to simultaneously cover the photographing lens and the distance-measuring lens during close-up photography, and the focus adjustment for close objects is parallax. A near feature that is done automatically without! Auto-focus camera capable of I-shooting. 2. An autofocus camera capable of close-up photography according to claim 18, item 0), wherein the auxiliary lens also covers the finder at the time of close-up photography.
JP16370481A 1981-10-14 1981-10-14 Automatic focusing camera capable of closeup shooting Pending JPS5863921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16370481A JPS5863921A (en) 1981-10-14 1981-10-14 Automatic focusing camera capable of closeup shooting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16370481A JPS5863921A (en) 1981-10-14 1981-10-14 Automatic focusing camera capable of closeup shooting

Publications (1)

Publication Number Publication Date
JPS5863921A true JPS5863921A (en) 1983-04-16

Family

ID=15779031

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16370481A Pending JPS5863921A (en) 1981-10-14 1981-10-14 Automatic focusing camera capable of closeup shooting

Country Status (1)

Country Link
JP (1) JPS5863921A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4936664A (en) * 1986-05-12 1990-06-26 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens drive system for camera
US4944030A (en) * 1986-05-12 1990-07-24 Asahi Kogaku Kogyo K.K. Lens shutter camera including zoom lens
US5142315A (en) * 1986-05-12 1992-08-25 Asahi Kogaku Kogyo Kabushiki Kaisha Lens shutter type of camera including zoom lens
US5150145A (en) * 1986-05-12 1992-09-22 Asahi Kogaku Kogyo Kabushiki Kaisha Lens shutter camera including zoom lens
US5162831A (en) * 1986-05-12 1992-11-10 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens drive system for camera
US5280317A (en) * 1986-05-12 1994-01-18 Asahi Kogaku Kogyo Kabushiki Kaisha Lens shutter camera including zoom lens drive system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4936664A (en) * 1986-05-12 1990-06-26 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens drive system for camera
US4944030A (en) * 1986-05-12 1990-07-24 Asahi Kogaku Kogyo K.K. Lens shutter camera including zoom lens
US5142315A (en) * 1986-05-12 1992-08-25 Asahi Kogaku Kogyo Kabushiki Kaisha Lens shutter type of camera including zoom lens
US5150145A (en) * 1986-05-12 1992-09-22 Asahi Kogaku Kogyo Kabushiki Kaisha Lens shutter camera including zoom lens
US5162831A (en) * 1986-05-12 1992-11-10 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens drive system for camera
US5276475A (en) * 1986-05-12 1994-01-04 Asahi Kogaku Kogyo Kabushiki Kaisha Lens shutter camera including zoom lens
US5280317A (en) * 1986-05-12 1994-01-18 Asahi Kogaku Kogyo Kabushiki Kaisha Lens shutter camera including zoom lens drive system
US5321462A (en) * 1986-05-12 1994-06-14 Asahi Kogaku Kogyo Kabushiki Kaisha Lens shutter camera including zoom lens

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