Interchangeable finder type camera

Details Interchangeable finder type camera Interchangeable finder type camera

1974-03-27

1976-02-24

Hix, L. T.

354 56, G03B 1300, G03B 700

Patent

active

039407799

ABSTRACT:
A single lens reflex camera includes an interchangeable objective lens provided with a diaphragm adjusting ring having a drive element and an interchangeable view finder unit housing a light responsive exposure determining means including a follower movable with a varying parameter of the means between a retracted position and a resiliently urged advanced position. A blocking element is normally locked in a position projecting from the unit and preventing the mounting of the finder, and when the follower is released, the blocking element is retractable. The follower is locked in its retracted position and when the finder is mounted the follower is released for movement into operative engagement with the drive element.

REFERENCES:
patent: 3733984 (1973-05-01), Yata

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