Means for enabling stopped-down measurement in exposure control

Details Means for enabling stopped-down measurement in exposure control Means for enabling stopped-down measurement in exposure control

1975-08-18

1976-09-21

Griffin, Donald A.

354270, G03B 906, G03B 700

Patent

active

039822575

ABSTRACT:
In a single lens reflex camera having a full-aperture measurement type exposure control circuit, a diaphragm interlocking ring which is connected with a variable resistor to control the exposure control circuit in accordance with the diaphragm is provided. An interchangeable lens having a manually operable diaphragm control ring or an intermediate ring to be interposed between the camera body and the interchangeable lens has a pin to be engaged with the diaphragm interlocking ring and to move the ring up to the full-aperture position when the lens is mounted to the camera body.

REFERENCES:
patent: 2845013 (1958-07-01), Schutz
patent: 2967472 (1961-01-01), Gebele
patent: 3710706 (1973-01-01), Sanada
patent: 3722390 (1973-03-01), Schlapp et al.
patent: 3849785 (1974-11-01), Schulze
patent: 3858225 (1974-12-01), Hasegawa et al.

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