Image magnification control device for a camera

Details Image magnification control device for a camera Image magnification control device for a camera

1991-02-04

1992-10-27

Hix, L. T.

35419512, G03B 1300

Patent

active

051593777

ABSTRACT:
An image magnification control device for a camera. Control focal length required to maintain an image magnification constant is computed based upon defocus information detected by analyzing a light that passes through a photographic lens. In case a focal length of the photographic lens moves out of a range wherein the set image magnification can be obtained, various options, such as a shutter-release lock operation, can be executed depending upon the chosen design of the camera.

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P. 67 of an instruction manual for an Infinity Super Zoom 300 camera, published Jul., 1988.

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