Zoom lens system having short total length

Details Zoom lens system having short total length Zoom lens system having short total length

1991-09-20

1993-06-22

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359654, 359687, G02B 1514

Patent

active

052219968

ABSTRACT:
A zoom lens system comprising at least a first lens unit having a positive refractive power as a whole, a second lens unit having a negative refractive power as a whole and a third lens unit having a positive refractive power as a whole, and adapted to perform variation of focal length by varying at least two airspaces reserved between said lens units. This zoom lens system consists of a small number of lens elements, has a short total length and a compact external design, and is light in weight.

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