Zoom lens system capable of macrophotography

Details Zoom lens system capable of macrophotography Zoom lens system capable of macrophotography

1979-07-03

1981-03-10

Clark, Conrad J.

G02B 710

Patent

active

042550203

ABSTRACT:
The optical system includes a variator lens and a compensator lens each adapted for cammed axial movement along the optical axis in response to rotation of a cam tube for varying the focal length of the system in a normal zoom range between a telephoto condition and a wide-angle condition. A control member is coupled to the cam tube and is shiftable between a normal range condition for preventing axial movement of the cam tube during focusing in the normal zoom range and a macrophotographic range condition which effects a cammed axial movement of the cam tube in response to rotation thereof for focusing the system in a macrophotographic range. Radially shiftable and axially shiftable control mechanisms are disclosed.

REFERENCES:
patent: 3277783 (1966-10-01), Eggert
patent: 3465662 (1969-09-01), Kashiwase
patent: 3506338 (1970-04-01), Holderbaum
patent: 3582188 (1971-06-01), Rau
patent: 3891310 (1975-06-01), Hideo

Affiliated with

Also associated with

Rating

Zoom lens system capable of macrophotography does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Zoom lens system capable of macrophotography, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zoom lens system capable of macrophotography will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1291394