Retrofoucus photographic lens

Details Retrofoucus photographic lens Retrofoucus photographic lens

1996-10-15

1998-06-30

Epps, Georgia Y.

Optical: systems and elements

Lens

Reverse telephoto

359752, 359714, 359713, 359708, G02B 1304, G02B 302

Patent

active

057742790

ABSTRACT:
A retrofocus type lens includes a front lens group including at least one negative lens and a rear lens group provided nearer than the front lens group to an image side, including at least two positive lenses and a negative lens. A positive lens of the rear lens group which is closest to an object side, is made of glass. Lenses of more than half of lens elements are made of plastic, and satisfy the following conditional expression,

REFERENCES:
patent: 5218480 (1993-06-01), Moskovich
patent: 5321551 (1994-06-01), Choi

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