Compact large-aperture photographic lens system with long back f

Details Compact large-aperture photographic lens system with long back f Compact large-aperture photographic lens system with long back f

1977-03-01

1978-07-11

Clark, Conrad J.

350215, G02B 1132

Patent

active

040998436

ABSTRACT:
A compact large-aperture photographic lens system having six-component seven-element lens configuration and comprising a first, second, third, fourth, fifth and sixth lens components, in which the first and second lens components are positive meniscus lenses, the third lens component is a negative meniscus lens, the fourth lens component is a cemented meniscus doublet, the fifth lens component is a positive meniscus lens and the sixth lens component is a positive lens, the compact large-aperture photographic lens having a short overall length and long back focal length.

REFERENCES:
patent: 3552829 (1971-01-01), Marquardt
patent: 3738736 (1973-06-01), Shimizu
patent: 3743387 (1973-07-01), Nakagawa
patent: 3851953 (1974-12-01), Nakagawa
patent: 3984155 (1976-10-01), Nakagawa

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