Zoom lens and image pickup apparatus including the same

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

2011-07-19

2011-07-19

Sugarman, Scott J (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S557000, C359S686000, C359S687000

Reexamination Certificate

active

07982967

ABSTRACT:
A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a rear group including at least one lens unit. For zooming from a wide angle end to a telephoto end, the first lens unit moves to the object side, the second lens unit moves to the image side, and the third lens unit moves to the object side. Moving amounts of the first lens unit, the second lens unit, and the third lens unit for zooming from the wide angle end to the telephoto end and focal lengths of the second lens unit and the third lens unit are set based on predetermined conditions.

REFERENCES:
patent: 7057818 (2006-06-01), Hamano et al.
patent: 7177092 (2007-02-01), Satori et al.
patent: 7206137 (2007-04-01), Nakatani et al.
patent: 7286304 (2007-10-01), Ohtake
patent: 7457045 (2008-11-01), Fujisaki et al.

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