Optical system and optical apparatus having the same

Details Optical system and optical apparatus having the same Optical system and optical apparatus having the same

1998-10-14

2000-09-05

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359684, 359686, 359557, G02B 1514, G02B 2764

Patent

active

061151882

ABSTRACT:
An optical system includes, in order from an object side, a first lens unit of positive refractive power, a second lens unit of negative refractive power, the second lens unit being movable along an optical axis to effect focusing, and a third lens unit of positive refractive power, the third lens unit including, in order from the object side, a first lens subunit of positive refractive power, a second lens subunit of negative refractive power and a third lens subunit of positive refractive power, wherein the second lens subunit is movable in directions perpendicular to the optical axis to displace an image formed by the optical system.

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