Zoom lens

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G - Physics

02

B

88/100

G02B 15/16 (2006.01) G02B 13/18 (2006.01) G02B 15/06 (2006.01) G02B 15/14 (2006.01) G02B 15/22 (2006.01)

Patent

CA 1086116

ABSTRACT OF THE DISCLOSURE The present invention provides a zoom lens having at least two slidable lens elements, a first mechanical control means for moving the slidable lens elements in accordance with a first law such that images of different magnification of objects lying beyond a predetermined distance from the zoom lens may be focussed in an image plane and a second, macro, mechanical control means for moving the movable lens elements in accordance with a second law such that images of different magnification of an object nearer to the zoom lens than said predetermined distance may be focussed in said image plane, the lens means being selective- ly controllable by said first and second control means.

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