Macro lens

Details Macro lens Macro lens

1992-11-27

1994-07-19

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359740, 359792, G02B 1522

Patent

active

053314654

ABSTRACT:
A macro lens comprises first to third lens groups having positive powers and an aperture stop disposed the first and second lens groups. The first lens group, aperture stop and second lens group remain fixed with respect to one another and movable as one unit relative to the third lens group for focusing. The third lens group is stationary with respect to an image plane of the macro lens.

REFERENCES:
patent: 5007720 (1991-04-01), Hamanishi

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