Inverted telephoto type wide angle lens system

Details Inverted telephoto type wide angle lens system Inverted telephoto type wide angle lens system

1980-09-22

1984-02-14

Corbin, John K.

350458, G02B 1304, G02B 1318

Patent

active

044312733

ABSTRACT:
The present invention is directed to an inverted telephoto type wide angle lens system having a field angle of 114 degrees and an aperture ratio of 1/2.8. The lens system comprises eleven lens groups and fourteen lens elements which fulfill the following conditons:

REFERENCES:
patent: 3832035 (1974-08-01), Takahashi
patent: 3856386 (1974-12-01), Fujioka
patent: 3877795 (1975-04-01), Yamashita
patent: 3884556 (1975-05-01), Nakagawa
patent: 3981563 (1976-09-01), Nakamura
patent: 4013350 (1977-03-01), Ogawa
patent: 4029397 (1977-06-01), Yamashita
patent: 4150872 (1979-04-01), Sugiyama
patent: 4310222 (1982-01-01), Ikamori
patent: 4348085 (1982-09-01), Mogami

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