Telephoto lens

Details Telephoto lens Telephoto lens

1974-05-09

1976-03-09

Corbin, John K.

350255, G02B 962

Patent

active

039428761

ABSTRACT:
A telephoto 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. The rear lens has an equivalent focal length greater than that of the overall lens and may have negative power which presents a slight change in the equivalent length of the overall lens when the lens is close focused.

REFERENCES:
patent: 2187780 (1940-01-01), Gehrke et al.
patent: 2528212 (1950-10-01), Cook
patent: 2604013 (1952-07-01), Schade
patent: 3183813 (1965-05-01), Wohner et al.
patent: 3295407 (1967-01-01), Jeffree
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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