Interchangeable lens for cameras

Details Interchangeable lens for cameras Interchangeable lens for cameras

1977-07-08

1979-11-13

Griffin, Donald A.

354286, G03B 907, G03B 1700

Patent

active

041741676

ABSTRACT:
An interchangeable lens for cameras which can be modified so as to be able to be fitted to all types of cameras by only interchanging mount assemblies containing various different types of diaphragm operating means by using a lens barrel assembly containing a lens system and diaphragm blade means in common. In order to make the mass production and maintenance of high performances possible, this interchangeable lens includes a diaphragm operating lever which can be pivoted to the lens barrel assembly by a pin-hole connection and a diaphragm controlling cam ring and diaphragm correcting cam ring which can be rotatably held between the lens barrel assembly and mount assembly.

REFERENCES:
patent: 1950166 (1934-03-01), Durholz
patent: 3106883 (1963-10-01), Erbe
patent: 3633483 (1972-01-01), Nagashima
patent: 3858225 (1974-12-01), Hasegawa et al.
patent: 3889282 (1975-06-01), Hashimoto
patent: 3922699 (1975-11-01), Yamaki
patent: 3997906 (1976-12-01), Kashiwase

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