Vari-focal photographic lens system of rear lens group exchange

Details Vari-focal photographic lens system of rear lens group exchange Vari-focal photographic lens system of rear lens group exchange

1985-02-12

1987-12-29

Corbin, John K.

350465, 350469, G02B 1502, G02B 934, G02B 960

Patent

active

047156937

ABSTRACT:
A vari-focal photographic lens system of rear lens group exchange type comprising a front lens group and a rear lens group and arranged to vary the focal length of the lens system as a whole by exchanging the rear lens group for another rear lens group having a different lens configuration, the vari-focal photographic lens system being arranged so compactly and arranged that the variation of aberrations is small.

REFERENCES:
patent: 4253736 (1981-03-01), Momiyama
patent: 4340279 (1982-07-01), Ikamori
patent: 4394071 (1983-07-01), Yamada
patent: 4422734 (1983-12-01), Tanaka et al.
patent: 4466707 (1984-08-01), Ikemori et al.
patent: 4591234 (1986-05-01), Hamanishi
patent: 4596447 (1986-06-01), Yamada et al.

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