Electronic still photographic adaptor mountable single-lens refl

Details Electronic still photographic adaptor mountable single-lens refl Electronic still photographic adaptor mountable single-lens refl

1997-12-15

1999-08-17

Gray, David M.

Photography

With viewfinder

Selective or adjustable viewfinder field

396429, 348 64, 348334, G03B 1724

Patent

active

059406429

ABSTRACT:
A single-lens reflex camera has a mirror movable between a non-photographic position where light from a subject is transmitted to a finder optical system and a photographic position where the light is transmitted to a film plane, a focal-plane shutter normally closed to prevent the light from reaching the film plane and moved to open so as to allow the light to reach the film plane, and a removable, ordinary photograph back panel. The camera is also provided for electronic still photography with an electronic still photographic adaptor substituted for the back panel and having an image pick-up device located near the film plane when set thereon, and with an optical low-pass filter located between the focal-plane shutter and the mirror to cut off high space frequency components in space of light. The camera further has a first detection device for detecting mounting of the electronic still photographic adaptor, a second detection device for detecting mounting of the optical low-pass filter, and a control means for inhibiting the opening operation of the focal plane shutter when either one of the first and second detection devices detects no mounting, but for allowing the opening operation of the shutter when both detection devices detect the respective mountings.

REFERENCES:
patent: 4953029 (1990-08-01), Morimoto et al.

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