Zoom lens, optical apparatus, and method for forming an...

Details Zoom lens, optical apparatus, and method for forming an... Zoom lens, optical apparatus, and method for forming an...

2008-02-26

2011-10-18

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S676000, C359S681000, C359S682000, C359S683000, C359S684000, C359S685000, C359S686000, C359S689000, C359S691000, C359S708000, C359S713000, C359S714000, C359S715000, C359S726000, C359S740000

Reexamination Certificate

active

08040613

ABSTRACT:
In a zoom lens ZL1having a plurality of lens groups G1to G2which are disposed in order from an object, where a refractive index average value of the lens components which constitute the zoom lens ZL1is defined as ndav and a refractive index average value of the lens components which constitute the first lens group G1which is disposed to closest to the object among the plurality of lens groups G1to G2is defined as ndGlav, the zoom lens ZL1is constituted to satisfy the conditional expression ndav≧1.80 and to satisfy the conditional expression ndGlav≧1.85.

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