Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate
2007-01-16
2007-01-16
Sugarman, Scott J. (Department: 2873)
Optical: systems and elements
Lens
With variable magnification
C359S689000, C359S676000
Reexamination Certificate
active
11081497
ABSTRACT:
A zoom lens system includes ‘n’ (n≧3) lens groups. A first lens group that is the most object-side lens group of said zoom lens system has a positive refractive power, and a final lens group that is the most image-side lens group of the zoom lens system has a negative refractive power. The distance from the most object-side surface of the positive first lens group to the most image-side surface of the negative final lens group becomes shortest at an intermediate focal length between the short focal length extremity and the long focal length extremity.
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English language Abstract of JP 6-194573.
English language Abstract of JP 9-120028.
English language Abstract of JP 10-268191.
Collins Darryl J.
Greenblum & Bernstein P.L.C.
PENTAX Corporation
Sugarman Scott J.
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