Diaphragm device of a photographic lens

Details Diaphragm device of a photographic lens Diaphragm device of a photographic lens

1979-12-20

1981-04-28

Gonzales, John

G03B 906

Patent

active

042641780

ABSTRACT:
This specification discloses the diaphragm device of a photographic lens in which the stop-down operating performance over the entire area from the maximum aperture to the minimum aperture is made uniform and no aperture error occurs in the practical aperture range.

REFERENCES:
patent: 3590715 (1971-07-01), Schops
patent: 3922699 (1975-11-01), Yamaki
patent: 3997906 (1976-12-01), Kashiwase

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