Zoom lens

Details Zoom lens Zoom lens

1986-04-25

1988-08-23

Corbin, John K.

G02B 1516

Patent

active

047657227

ABSTRACT:
A zoom lens comprising four lens groups the fourth group of which is composed of a front group and a rear group and the rear group is movable in a determined relation with the third lens group along the optical axis for compensating the variation of aberrations caused by zooming so that the zoom lens can always maintain good image-forming performance through the wide zooming range.

REFERENCES:
patent: 3961845 (1976-06-01), Doi et al.
patent: 4641928 (1987-02-01), Hamanishi

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