Optical adaptor for movie and television cameras

Details Optical adaptor for movie and television cameras Optical adaptor for movie and television cameras

1978-11-09

1981-04-28

Clark, Conrad J.

350479, G02B 1502

Patent

active

042641519

ABSTRACT:
An optical adaptor is provided to permit objective lenses designated for a certain image format to be used on optical devices having a smaller image format. Thus, 35 mm single lens reflex camera lenses can be mounted on a cinematographic camera and a T.V. camera. The optical adaptor includes a pair of mounts for attachment respectively to the objective lens and to the optical device. Mounted within the adaptor housing is a positive refractive lens system capable of shortening the focal length and increasing the aperture ratio of the objective lens system. The lens system satisfies the condition that the magnification, .beta., is equal to or less than 1 and the refractive power of a negative element lens .PSI..sub.1 to that of a positive element lens, .PSI..sub.2, in the lens system, satisfies the following;

REFERENCES:
patent: 3441338 (1969-04-01), Johnson et al.
patent: 3981021 (1976-09-01), Beecher
patent: 4154508 (1977-05-01), Nakamura

Affiliated with

Also associated with

Rating

Optical adaptor for movie and television cameras does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical adaptor for movie and television cameras, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical adaptor for movie and television cameras will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-860480