JPS5529821A - Zoom lens - Google Patents
Zoom lensInfo
- Publication number
- JPS5529821A JPS5529821A JP10232478A JP10232478A JPS5529821A JP S5529821 A JPS5529821 A JP S5529821A JP 10232478 A JP10232478 A JP 10232478A JP 10232478 A JP10232478 A JP 10232478A JP S5529821 A JPS5529821 A JP S5529821A
- Authority
- JP
- Japan
- Prior art keywords
- holding frame
- lens group
- optical axis
- axis direction
- operating member
- 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
Landscapes
- Lens Barrels (AREA)
Abstract
PURPOSE: To make construction simple, reduce the occurrence of troubles and lower cost by screwing the 1st lens group to the end of a stationary barrel, connecting the same to the 2nd lens group holding frame by means of a connecting rod slidable in the optical axis direction and holding the lens groups directly in the zoom cam groups.
CONSTITUTION: When a zooming operating member 3 is linearly moved forward in the optical axis direction along a stationary barrel 1, the pin 10 and 2nd lens group L2 holding frame 8 engaging with the turning guide groove 3b of the operating member 3 turn by required quantity. This turning motion is transmitted to the 1st lens group L1 holding frame 6 by way of the moving rod 7 which is slidably fitted in a fitting groove 9. A screw coupling member 4 is prevented from turning by the slide guide groove 3a of the operating member 3 by way of a pin 5 and therefore the 1st lens group holding frame 6 advances along the optical axis and assumes a long- focus lens state. When the group holding frame 6 is turned following to this, the screw coupling member 4 becomes integral with the holding frame 6 and turn but the stationary barrel 1 is held stationary and therefore the holding frame 6 and 1st lens group L1 are retreated along the optical axis direction by a large-diameter screw part 4a and an external screw part 1a, whereby focusing is accomplished.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10232478A JPS5529821A (en) | 1978-08-24 | 1978-08-24 | Zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10232478A JPS5529821A (en) | 1978-08-24 | 1978-08-24 | Zoom lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5529821A true JPS5529821A (en) | 1980-03-03 |
Family
ID=14324365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10232478A Pending JPS5529821A (en) | 1978-08-24 | 1978-08-24 | Zoom lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5529821A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57190192A (en) * | 1981-05-06 | 1982-11-22 | Exxon Research Engineering Co | Heat insulating structure and heat insulating method |
| JPS5953308U (en) * | 1982-09-30 | 1984-04-07 | 株式会社ニコン | zoom lens barrel |
| JPS61175035A (en) * | 1985-01-31 | 1986-08-06 | 株式会社日立製作所 | Composite body of resin and inorganic material |
| JPH01287607A (en) * | 1988-05-16 | 1989-11-20 | Minolta Camera Co Ltd | Moving frame structure for zoom lens |
| US5313329A (en) * | 1987-08-21 | 1994-05-17 | Asahi Kogaku Kogyo Kabushiki Kaisha | Lens hood assembly for zoom lens |
-
1978
- 1978-08-24 JP JP10232478A patent/JPS5529821A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57190192A (en) * | 1981-05-06 | 1982-11-22 | Exxon Research Engineering Co | Heat insulating structure and heat insulating method |
| JPS5953308U (en) * | 1982-09-30 | 1984-04-07 | 株式会社ニコン | zoom lens barrel |
| JPS61175035A (en) * | 1985-01-31 | 1986-08-06 | 株式会社日立製作所 | Composite body of resin and inorganic material |
| US5313329A (en) * | 1987-08-21 | 1994-05-17 | Asahi Kogaku Kogyo Kabushiki Kaisha | Lens hood assembly for zoom lens |
| JPH01287607A (en) * | 1988-05-16 | 1989-11-20 | Minolta Camera Co Ltd | Moving frame structure for zoom lens |
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