Wide aperture long focal length lens

Details Wide aperture long focal length lens Wide aperture long focal length lens

1974-05-09

1976-03-09

Sacher, Paul A.

350176, 350216, G02B 964, G02B 100

Patent

active

039428753

ABSTRACT:
A wide aperture long focus photographic lens having internal aberration compensation and comprising an objective which is movable for focusing and a rear lens which is stationary with respect to the film plane and has an equivalent focal length which is substantially longer than the equivalent focal length of the overall lens.

REFERENCES:
patent: 2528212 (1950-10-01), Cook
patent: 2604013 (1952-07-01), Schade
patent: 3183813 (1965-05-01), Wohner et al.
patent: 3524700 (1970-08-01), Eggert et al.
patent: 3612661 (1971-10-01), Determann et al.
patent: 3815974 (1974-06-01), Momiyama

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