Compact zoom lens system

Details Compact zoom lens system Compact zoom lens system

1987-04-23

1988-09-20

Corbin, John K.

350423, 350432, G02B 1514, G02B 1318

Patent

active

047721065

ABSTRACT:
A compact zoom lens system comprising a first lens group having positive refractive power, a stop, and a second lens group having negative refractive power in the order from the object side wherein the first lens group comprises at least two positive lenses and at least one negative lens, and the second lens group comprises a positive lens and a negative lens and which is arranged to be zoomed by varying the airspace between the first and second lens groups, the compact zoom lens system being arranged to have the desired back focal length and a short overall length and being arranged that aberrations are corrected favorably, the compact zoom lens system being thereby arranged to be the most suitable for the use with a camera with a lens shutter.

REFERENCES:
patent: 4659186 (1987-04-01), Sato et al.
patent: 4679913 (1987-07-01), Sato et al.
patent: 4682860 (1987-07-01), Tanaka et al.
patent: 4720179 (1988-01-01), Ito

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