Wide angle lens system

Details Wide angle lens system Wide angle lens system

1996-03-06

1997-04-15

Sugarman, Scott J.

Optical: systems and elements

Lens

Reverse telephoto

359751, G02B 1304

Patent

active

056215754

ABSTRACT:
In a wide range of photographing from long shot to close-up, high resolving power and high contrast can be obtained in a wide angle lens system. The wide angle lens system comprises, successively from the object side, a negative meniscus first lens (L1), a junction lens composed of a positive second lens (L2) with a convex surface facing the object and a negative third lens (L3) with a concave surface facing the image, a junction lens composed of a biconvex fourth lens (L4) and a biconcave fifth lens (L5), a positive sixth lens (L6) with a convex surface facing the image, and a negative meniscus seventh lens (L7) with a convex lens facing the image. Also, it satisfies the following conditions (1) to (4):

REFERENCES:
patent: 5218480 (1993-06-01), Moskovich

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