Zoom lens system and image pickup apparatus having the same

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

2006-03-28

2006-03-28

Mack, Ricky L. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S689000

Reexamination Certificate

active

07019911

ABSTRACT:
Disclosed is a zoom lens system including in an order from an object side to an image side: a first lens unit having a negative refractive power; a second lens unit having a positive refractive power; and a third lens unit having a positive refractive power, in which zooming is performed by changing each distance among the first, second, and third lens units. In this zoom lens system, partial charge of a changing magnification between the second and third lens units is suitably set to maintain excellent optical performance over the overall zoom area while a zoom ratio is large.

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