Wide-angle photographic lens

Details Wide-angle photographic lens Wide-angle photographic lens

1982-09-23

1984-08-28

Corbin, John K.

G02B 964

Patent

active

044681003

ABSTRACT:
A small-size and high-performance wide-angle photographic lens system of the seven-group-seven-element type including first and second components of negative meniscus lenses with convex surfaces directed to the object, a third component of a positive lens having a large-curvature convex surface directed to the object, a fourth component of a positive lens having a large-curvature convex surface directed to the image, a fifth component of a biconcave negative lens, a sixth component of a positive meniscus lens having a convex surface directed to the image, and a seventh component of a positive lens.

REFERENCES:
patent: 3874770 (1975-04-01), Shimizu
patent: 4046459 (1977-09-01), Kawamura
patent: 4176914 (1979-12-01), Fujibayashi
patent: 4256373 (1981-03-01), Horimoto

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