Automatic exposure control means for single-lens reflex camera

Details Automatic exposure control means for single-lens reflex camera Automatic exposure control means for single-lens reflex camera

1974-04-08

1976-06-01

Hix, L. T.

354 43, 354 45, 354152, 354272, G03B 714

Patent

active

039613399

ABSTRACT:
Both the shutter speed and the diaphragm opening are selected in accordance with the exposure value measured by an exposure meter. A step cam plate is brought into engagement with the pointer of the exposure meter and the amount of movement of the step cam plate is determined by the position of the pointer. The step cam plate is associated with an exposure control ring which controls the diaphragm and the shutter speed. The exposure control ring is locked in its position during the exposure operation by means of a lock lever which is put into engagement with the exposure control ring when the mirror is swung up.

REFERENCES:
patent: 3416421 (1968-12-01), Biedermann et al.
patent: 3503313 (1970-03-01), Kuramoto
patent: 3611893 (1971-10-01), Starp
patent: 3715964 (1973-02-01), Tenkumo et al.

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