Attachment device for interchangeable optical device

Details Attachment device for interchangeable optical device Attachment device for interchangeable optical device

1984-05-29

1986-05-20

Gellner, Michael L.

350587, G03B 1104

Patent

active

045897514

ABSTRACT:
An attachment device, such as a protective cap, is attachable to an interchangeable lens that includes a diaphragm mechanism having a plurality of diaphragm blades overlapping one another to form a diaphragm and a diaphragm interlocked member interlocked with the diaphragm blades and urged for stopping down the diaphragm. The attachment device includes a diaphragm retaining member that drives the diaphragm interlocked member to a position to open the diaphragm larger than the minimum aperture, when the attachment device is attached to the interchangeable lens.

REFERENCES:
patent: 3620149 (1971-11-01), Ogihara
patent: 4390263 (1983-06-01), Sumita
The Catalogue of Japan Camera Show vol. 72 (Sep., 1981) p. 44.

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