Apparatus for exposure control for microphotography

Details Apparatus for exposure control for microphotography Apparatus for exposure control for microphotography

1978-11-28

1982-03-09

Hix, L. T.

354 60E, 354 79, G03B 704

Patent

active

043185991

ABSTRACT:
The invention contemplates improved exposure-control means for use in microphotography, providing optional availability of semi-automatic exposure control and of automatic exposure control, the arrangement being optionally and selectively applicable to large-frame and to small-frame (miniature) photography, with provision for appropriate compensation for film speed and, in the case of long-duration exposures, for compensating for the Schwarzschild effect.

REFERENCES:
patent: 3386358 (1968-05-01), Kropp
patent: 3863263 (1975-01-01), Itagaki
patent: 3936842 (1976-02-01), Nanba et al.
patent: 3968502 (1976-07-01), Shiozawa et al.
patent: 3987463 (1976-10-01), Nishikawa et al.
patent: 4107707 (1978-08-01), Numata et al.
patent: 4112446 (1978-09-01), Numata et al.

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