Title:
ZOOM LENS SYSTEM
Document Type and Number:
Japanese Patent JPS5391756
Kind Code:
A
Abstract:
PURPOSE: To reduce the residual quantity of aberration and the variation quanity of aberration accompanied with bariable powers by constituting the zoom lens system with a front group having a divergent refractive power as a whole and a rear group having a convergent refracting power as a whole and satisfying the specific conditions between each lens.
Inventors:
OGINO SHIYUUJI
Application Number:
JP616777A
Publication Date:
August 11, 1978
Filing Date:
January 21, 1977
Export Citation:
Assignee:
MINOLTA CAMERA KK
International Classes:
G02B13/04; G02B15/16; G02B15/177; (IPC1-7): G02B9/64; G02B13/04; G02B15/14
Domestic Patent References:
| JPS5182642A | 1976-07-20 |
Foreign References:
| US3517979A | 1970-06-30 |