JPS5772128A - Focusing controller in zoom lens - Google Patents
Focusing controller in zoom lensInfo
- Publication number
- JPS5772128A JPS5772128A JP14873380A JP14873380A JPS5772128A JP S5772128 A JPS5772128 A JP S5772128A JP 14873380 A JP14873380 A JP 14873380A JP 14873380 A JP14873380 A JP 14873380A JP S5772128 A JPS5772128 A JP S5772128A
- Authority
- JP
- Japan
- Prior art keywords
- zooming
- shaft
- focus adjustment
- lens
- irrespectively
- 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
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
PURPOSE:To perform focal length adjustment and focus adjustment mutually irrespectively by fixing the foremost lens to a shaft slidable in the optical axis direction in a zoom lens barrel, and using the shafts for zooming as guides thereby perfoming focus adjustment. CONSTITUTION:The lens frame 9 of the foremost lens group 3b is fixed to a shaft 10, and are guided and supported by shafts 11, 12 for zooming slidably in the optical axis direction. The trailing end of the shaft 10 projects from a stationary lens barrel 8, and is brought in pressure contact with a cam 15 having a manual adjusting knob 28. With this constitution, at the time of zooming, a ring 24 is turned, and pins 18, 20 are adjusted of positions by cam grooves 19, 21, by which movable lens groups 4, 5 are moved. At this time, the shaft 10 does not displace at all. At the time of focus adjustment, the knob 28 is turned, then the lens group 3b is displaced by the turning of the cam 15 so that the focus is adjusted irrespectively of the zooming. Thereby, the focus adjustment and the zooming are carried out mutually irrespectively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14873380A JPS5772128A (en) | 1980-10-23 | 1980-10-23 | Focusing controller in zoom lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14873380A JPS5772128A (en) | 1980-10-23 | 1980-10-23 | Focusing controller in zoom lens |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5772128A true JPS5772128A (en) | 1982-05-06 |
Family
ID=15459385
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14873380A Pending JPS5772128A (en) | 1980-10-23 | 1980-10-23 | Focusing controller in zoom lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5772128A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0474563A2 (en) * | 1990-09-05 | 1992-03-11 | Sony Corporation | Lens barrel |
-
1980
- 1980-10-23 JP JP14873380A patent/JPS5772128A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0474563A2 (en) * | 1990-09-05 | 1992-03-11 | Sony Corporation | Lens barrel |
US5231473A (en) * | 1990-09-05 | 1993-07-27 | Sony Corporation | Lens barrel |
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