Macro lens system

Details Macro lens system Macro lens system

1987-01-08

1988-09-20

Corbin, John K.

350463, G02B 962, G02B 964

Patent

active

047721081

ABSTRACT:
A macro lens system consisting from the object side of a front unit of negative focal length, a middle unit of positive focal length and a rear unit of large focal length. During focusing, all lens units are displaced. Additionally the front and middle units are displaced en masse with respect to the rear unit. Numerical conditions are given on the focal length of the front unit and of the combination of the front and middle unit and on the relative displacements during focusing.

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