Photographic lens system having a large aperture ratio

Details Photographic lens system having a large aperture ratio Photographic lens system having a large aperture ratio

1977-04-05

1978-08-15

Clark, Conrad J.

350218, G02B 1130

Patent

active

041068548

ABSTRACT:
A gauss type photographic lens system having a large aperture ratio which comprises five components of six lens elements and wherein symmetry of coma is improved and curvature of field, spherical aberration, etc., are favorably corrected by enlarging the airspace comprising a stop and increasing refractive indices of the lens elements arranged on both the sides of said stop.

REFERENCES:
patent: 3817603 (1974-06-01), Takahashi
patent: 4045127 (1977-08-01), Matsubara

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