Image magnification control device for a camera

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

1995-04-28

1998-07-14

Gray, David M.

Photography

With exposure objective focusing means, focusing aid, or...

Lens drive circuit or motor structure

396349, G03B 1334

Patent

active

057818096

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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