Large aperature ratio zoom lens system

Details Large aperature ratio zoom lens system Large aperature ratio zoom lens system

1985-10-11

1988-01-19

Corbin, John K.

G02B 1516, G02B 964

Patent

active

047201819

ABSTRACT:
A large aperture ratio zoom lens system is provided for use in a video camera. The lens system includes a first lens unit of a positive refractive power, a second lens of a negative refractive power, a third lens unit of a negative refractive power, a fourth lens unit of a positive refractive power, an aperture diaphragm, and a fifth lens unit of a positive refractive power. A second lens component in the fifth lens unit has a strong negative refractive power and has a capability to correct field curvature as well as spherical aberrations.

REFERENCES:
patent: 3336094 (1967-08-01), Macher

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