Camera with variable focal length optical system

Details Camera with variable focal length optical system Camera with variable focal length optical system

1989-11-09

1991-05-07

Griffin, Donald A.

35419512, 354288, G03B 1702, G03B 118, G03B 1704

Patent

active

050140779

ABSTRACT:
A camera is provided with a focal length variable photo-taking optical system in which a focal length varying cam groove for varying the focal length of the phototaking optical system and a barrel sinking cam groove for stowing the optical system inside a camera body are continuously arranged. In photographing, a focal length varying action can be accomplished continuously from moving the photo-taking optical system out of the camera body. In addition to that, a lens protecting cover is arranged to be automatically openable in association with the action for moving the photo-taking optical system out of the camera body.

REFERENCES:
patent: 2358321 (1944-09-01), Fassin
patent: 3613544 (1971-10-01), Plihal et al.
patent: 4002405 (1977-01-01), Stahl
patent: 4171894 (1979-10-01), Yamada
patent: 4410253 (1983-10-01), Tsuboi
patent: 4522478 (1985-06-01), Kando et al.

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