Zoom lens, optical apparatus having the same, and...

Details Zoom lens, optical apparatus having the same, and... Zoom lens, optical apparatus having the same, and...

2009-10-09

2010-11-16

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S684000, C359S685000, C359S740000, C359S726000, C359S764000

Reexamination Certificate

active

07835089

ABSTRACT:
A zoom lens having an optical element for deflecting an optical path includes, in order from an object: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group having positive refractive power; a fourth lens group having positive refractive power; and a fifth lens group having negative refractive power. The third lens group has a plurality of lenses, and the following conditional expressions 1.00<PL/fW<1.75 and 0.30<PL/fT<0.45 are satisfied, where PL denotes an optical path length of the optical element for deflecting the optical path, fW denotes a focal length of the zoom lens in a wide angle end state, and fT denotes a focal length of the zoom lens in a telephoto end state.

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