Zoom lens and image pickup apparatus having the same

Optical: systems and elements – Lens – With variable magnification

Reexamination Certificate

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Details

C359S691000

Reexamination Certificate

active

11559998

ABSTRACT:
At least one exemplary embodiment is directed to a zoom lens, which includes, in order from an object side to an image side, a first lens unit of negative refractive power, and a second lens unit of positive refractive power. An interval between the first and second lens units changes during zooming. The first lens unit includes a negative lens and a positive lens in order from the object side to the image side. A refractive index of a material of the negative lens, a refractive index of a material of the positive lens, a focal length of the first lens unit satisfy appropriate conditions.

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patent: 2005-055496 (2005-03-01), None

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