Zoom lens assembly for photographic cameras

Details Zoom lens assembly for photographic cameras Zoom lens assembly for photographic cameras

G - Physics

02

B

88/100

G02B 7/10 (2006.01) G02B 15/14 (2006.01) G02B 15/18 (1980.01)

Patent

CA 1078236

ZOOM LENS ASSEMBLY FOR PHOTOGRAPHIC CAMERAS ABSTRACT OF THE DISCLOSURE A zoom lens assembly for photographic cameras, particularly for movie cameras, has a focussing ring, a zooming ring and a fixed-tube for supporting these rings as well as associated lenses. A locking device is provided for locking the focussing ring at the hyperfocal position and at the same time for restricting the zooming range to one in which a sharp image can be produced independently from the zooming operation with the focussing lens being set at the hyperfocal position.

275811

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