1983-09-15
1986-12-23
Corbin, John K.
350423, G02B 1514, G02B 1515
Patent
active
046308997
ABSTRACT:
In the disclosed zoom lens, a varifocal lens system includes a positive first component at the object end of the system and is movable closer to the object in a telephoto position than in a wide angle position. A diaphragm on the image end of the varifocal lens system is movable during zooming and the location of the diaphragm in the telephoto position is closer to the object than in the wide angle position.
REFERENCES:
patent: 4232942 (1980-11-01), Ikemori
patent: 4348082 (1982-09-01), Ogawa
patent: 4506958 (1985-03-01), Imai
Ikemori Keiji
Kato Masatake
Canon Kabushiki Kaisha
Corbin John K.
Gass Rebecca D.
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