Zoom lens having an easily changeable range of variable focal di

Details Zoom lens having an easily changeable range of variable focal di Zoom lens having an easily changeable range of variable focal di

1977-03-15

1979-06-05

Sacher, Paul A.

350184, 350207, G02B 1512, G02B 1516

Patent

active

041572114

ABSTRACT:
A zoom lens having a lens part for focusing, a zooming part consisting of a plurality of movable lens groups to vary focal distance, and a lens part for imaging in the rear of the zoom lens. The lens part for imaging consists of a front group. A rear group and a variable magnification lens group can be mounted at and dismounted from a position between the front group and rear group. A range of variable focal distance can be easily changed by shifting a portion of lenses positioned closer to the image side of a diaphragm in order to separate further an exit pupil of the total system from an imaging plane as the variable magnification lens group is mounted.

REFERENCES:
patent: 4015895 (1977-04-01), Hirose

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