Large relative aperture telephoto lens system

Details Large relative aperture telephoto lens system Large relative aperture telephoto lens system

1983-08-17

1985-08-13

Corbin, John K.

350463, G02B 964, G02B 1302

Patent

active

045346267

ABSTRACT:
A large relative aperture telephoto lens system comprising a first converging lens group, a diverging lens group and a second converging lens group, arranged in said first lens group being a first positive lens component made of a glass material having a large anomalous partial dispersion ratio .theta..sub.i, a negative lens component made of a glass material having a small anomalous partial dispersion ratio .theta..sub.i and at least one of a second and third positive lens components made of a glass material having a large anomalous partial dispersion ratio .theta..sub.i, whereby longitudinal chromatic aberration is corrected to a very low level.

REFERENCES:
patent: 4176913 (1979-12-01), Nakamura et al.

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