Camera lens and filter adapter assembly

Details Camera lens and filter adapter assembly Camera lens and filter adapter assembly

1991-10-10

1993-05-04

Gellner, Michael L.

G03B 1100

Patent

active

052086240

ABSTRACT:
An improved camera lens and filter adapter assembly has application for use in video and photographic cameras, and in particular, cameras using filters or special effects equipment. Camera lenses are housed in a helical mount located on the lens and filter adapter assembly and focusing of the lens will not rotate the helical mount in a radial direction. Because of this, filters and special effects devices, such as a polarizing filter or a matte box, which must remain stationary in a radial direction will not be effected during focusing. Filters and special effects devices are magnetically coupled to the lens and filter adapter assembly using magnetic rings. Magnetic coupling provides quick, easy and secure mounting of filters and special effects devices to cameras and permits a camera-person to cascade as many filters or special effects devices as needed.

REFERENCES:
patent: 4558936 (1985-12-01), Petersen
patent: 4684231 (1987-08-01), Athy
patent: 4764784 (1988-08-01), Torikoshi et al.
patent: 5097280 (1992-03-01), Nomura

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