Ultra-wide-angle type zoom lens

Details Ultra-wide-angle type zoom lens Ultra-wide-angle type zoom lens

1992-02-27

1994-06-28

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359684, 359708, G02B 1514, G02B 1318

Patent

active

053252365

ABSTRACT:
An ultra-wide-angle type zoom lens is disclosed, comprising, in the order from the object side, a negative first lens unit, a negative second lens unit and a positive third lens unit, wherein zooming from the wide-angle end to the telephoto end is performed by differentially moving the second and third lens units.

REFERENCES:
patent: 4054372 (1977-10-01), Schroeder
patent: 4135786 (1979-01-01), Ikamori
patent: 4696553 (1987-09-01), Tsuji et al.
patent: 4776680 (1988-10-01), Tanaka
patent: 4830477 (1989-05-01), Takahashi et al.
patent: 4865434 (1989-09-01), Matsushita et al.
patent: 5059007 (1991-10-01), Tanaka

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