JPS55146407A - Zoom lens barrel - Google Patents
Zoom lens barrelInfo
- Publication number
- JPS55146407A JPS55146407A JP5405979A JP5405979A JPS55146407A JP S55146407 A JPS55146407 A JP S55146407A JP 5405979 A JP5405979 A JP 5405979A JP 5405979 A JP5405979 A JP 5405979A JP S55146407 A JPS55146407 A JP S55146407A
- Authority
- JP
- Japan
- Prior art keywords
- groove
- pin
- stopper pin
- side wall
- near distance
- 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.)
- Granted
Links
Landscapes
- Lens Barrels (AREA)
Abstract
PURPOSE: To expand a near distance photographing range by forming the side wall of the near distance side of the notched part to cam form in the notched part which defines the rotating angle of a stopper pin rotating about the optical axis according to focal length operations.
CONSTITUTION: When an operating ring 23 is moved forward and backward in the axial direction, the 2nd movable lens group 2 is moved togehter with a movable frame 4 by way of a guide pin 25 and groove 23 as well as a pin 16 and oblique groove 8a, whereby zooming is accomplished. Next, when the operating ring 23 is turned, the groove 23 drives a stopper pin 22 which in turn rotates a lens frame 21 and helcoid 5, by which the 1st lens group 1 is moved forward and backward and focusing is thus accomplished. At this time, a rectilinear frame 24 is moved by the guide pin 25 and groove 23b and the relative position of the stopper pin 22 changes on the wide angle side (W) and telephoto side (T). This causes the rotating angle of the stopper pin 22 from the horizontal side wall 24a' to the cam side wall 24a" in the notched part to change, thus the rotating angle larger than that on the W side is obtained on the T side and the near distance photographing range is expanded.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5405979A JPS5837525B2 (en) | 1979-05-04 | 1979-05-04 | zoom lens barrel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5405979A JPS5837525B2 (en) | 1979-05-04 | 1979-05-04 | zoom lens barrel |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55146407A true JPS55146407A (en) | 1980-11-14 |
JPS5837525B2 JPS5837525B2 (en) | 1983-08-17 |
Family
ID=12960035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5405979A Expired JPS5837525B2 (en) | 1979-05-04 | 1979-05-04 | zoom lens barrel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5837525B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5957208A (en) * | 1983-08-19 | 1984-04-02 | Tamuron:Kk | Zoom lens |
-
1979
- 1979-05-04 JP JP5405979A patent/JPS5837525B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5957208A (en) * | 1983-08-19 | 1984-04-02 | Tamuron:Kk | Zoom lens |
Also Published As
Publication number | Publication date |
---|---|
JPS5837525B2 (en) | 1983-08-17 |
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