Patent
1981-06-02
1987-01-06
Corbin, John K.
350423, 350428, 350450, 354286, G02B 15163, G02B 1522, G03B 1714
Patent
active
046342362
ABSTRACT:
A compact zoom lens system capable of providing a high zoom ratio ranging to a wide field angle is provided. The zoom lens system utilizes four separate lens groups or units with the first lens group or unit being of a positive refractive power and the fourth lens group or unit being capable of axial movement for focusing. The zooming mode of operation is capable of being provided by the first three lens groups or units, while the fourth lens group or unit can be separated and, in fact, integrally mounted for a focusing movement in the camera body. Thus, interchangeable lens system without independent focusing can be positioned on the camera body.
REFERENCES:
patent: 3481666 (1969-12-01), Higuchi
patent: 3549242 (1970-12-01), Higuchi et al.
patent: 3884555 (1975-05-01), Suwa et al.
patent: 3912376 (1975-10-01), Ogura et al.
patent: 3975089 (1976-08-01), Betensky
patent: 4198126 (1980-04-01), Abe et al.
patent: 4240700 (1980-12-01), Ogawa et al.
Betensky et al; "Continuous Close Focusing Telephoto Zoom Lenses;" SPIE; vol. 237; 1980 Intl. Lens Design Conference; pp. 488-496.
Tokina 35-105 mm Lens: (a) Advertisement, Modern Photography, April 1980, (b) Pamphlet for the PMA Show, 1980, (c) Article at pp. 82-84 of Camera Review, Sep. 1980.
All of the Canon, Nov. 1976.
Corbin John K.
Minolta Camera Kabushiki Kaisha
Sugarman Scott J.
LandOfFree
Compact zoom lens system of a relatively high zoom ratio capable does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compact zoom lens system of a relatively high zoom ratio capable, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compact zoom lens system of a relatively high zoom ratio capable will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-680332