JPS572010A - Lens barrel - Google Patents
Lens barrelInfo
- Publication number
- JPS572010A JPS572010A JP7559280A JP7559280A JPS572010A JP S572010 A JPS572010 A JP S572010A JP 7559280 A JP7559280 A JP 7559280A JP 7559280 A JP7559280 A JP 7559280A JP S572010 A JPS572010 A JP S572010A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- diaphragm blade
- gives
- blade
- fitted
- 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
- 230000035939 shock Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/02—Diaphragms
- G03B9/06—Two or more co-operating pivoted blades, e.g. iris type
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lens Barrels (AREA)
- Diaphragms For Cameras (AREA)
Abstract
PURPOSE:To get rid of a shock at the time of stopping-down, by providing the first diaphragm blade which gives the effective and maximum diaphragm opening for changing a diaphragm device, and the second diaphragm blade which gives the exposure diaphragm opening from a substantial opening state exceeding the effective and maximum diaphragm opening. CONSTITUTION:When a ring 11 mounted a diaphragm blade is rotated, a rotary center axis 12a of the first diaphragm blade 12 also changes its position to the circumference of the optic axis, but an adjustment ring 14 into which a cam pin 12b of the first diaphragm blade 12 is fitted holds a constant position against the circumference of the optic axis since a pin 14b is fitted into a groove 2e in the direction of the optic axis of a fixed barrel 2. Accordingly, the cam pin 12b of the first diaphragm blade 12 changes the position fitted into an adjustment can groove 14a of the adjustment ring 14 as the position of the rotary center axis 12a is changed, by which the first diaphragm blade 12 is rotated turning around the rotary center axis 12a, changes its diaphragm aperture, and gives a proper open photometric aperture according to the focal length of a lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7559280A JPS572010A (en) | 1980-06-06 | 1980-06-06 | Lens barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7559280A JPS572010A (en) | 1980-06-06 | 1980-06-06 | Lens barrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS572010A true JPS572010A (en) | 1982-01-07 |
Family
ID=13580618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7559280A Pending JPS572010A (en) | 1980-06-06 | 1980-06-06 | Lens barrel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS572010A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017097243A (en) * | 2015-11-26 | 2017-06-01 | キヤノン株式会社 | Lens barrel and optical equipment |
| JP2019194724A (en) * | 2019-07-05 | 2019-11-07 | 株式会社ニコン | Diaphragm unit, lens barrel, and camera |
| JP2020194194A (en) * | 2020-09-03 | 2020-12-03 | 株式会社ニコン | Diaphragm unit, lens barrel, and camera |
-
1980
- 1980-06-06 JP JP7559280A patent/JPS572010A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017097243A (en) * | 2015-11-26 | 2017-06-01 | キヤノン株式会社 | Lens barrel and optical equipment |
| JP2019194724A (en) * | 2019-07-05 | 2019-11-07 | 株式会社ニコン | Diaphragm unit, lens barrel, and camera |
| JP2020194194A (en) * | 2020-09-03 | 2020-12-03 | 株式会社ニコン | Diaphragm unit, lens barrel, and camera |
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