Zoom lens system and image pickup apparatus including the same

Details Zoom lens system and image pickup apparatus including the same Zoom lens system and image pickup apparatus including the same

2007-12-04

2007-12-04

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S676000

Reexamination Certificate

active

11453192

ABSTRACT:
At least one exemplary embodiment is directed to a zoom lens system having a telephoto-type configuration at the telephoto end. When assuming that an Abbe number is vd, and a partial dispersion ratio is θgF, this zoom lens system includes a refractive optical element having positive refracting power made up of a solid material that can satisfy the following conditions:in-line-formulae description="In-line Formulae" end="lead"?−2.100×10−3·vd+0.693<θgFin-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.555<θgF<0.9in-line-formulae description="In-line Formulae" end="tail"?Thus, facilitating the configuration of a zoom lens system capable of appropriately correcting and/or reducing various aberrations, including a chromatic aberration straddling the entire zoom area.

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