Gauss type photographic lens

Details Gauss type photographic lens Gauss type photographic lens

1980-07-18

1983-06-28

McGraw, Vincent P.

350255, G02B 936

Patent

active

043902529

ABSTRACT:
A Gauss type photographic lens comprises, in succession from the object side, a first group including a positive lens component, a second group including a positive lens and a negative lens and having a negative refractive power as a whole, a third group including a meniscus lens component comprising a negative lens and a positive lens cemented together and having its concave surface facing the object side, and a fourth group including a positive lens component. The lens component in said fourth group is movable along the optical axis and the focusing is accomplished only by movement of said movable lens.

REFERENCES:
patent: 1463132 (1923-07-01), Graf
patent: 2503789 (1950-04-01), Wood et al.

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