Dual focal length camera

Details Dual focal length camera Dual focal length camera

1999-05-19

2000-08-08

Perkey, W. B.

Photography

Having variable focal length of camera objective

396352, G03B 1500, G03B 1700

Patent

active

06101334&

ABSTRACT:
Compact dual focal length cameras are disclosed having wide angle and telephoto modes of operation. The ratio of telephoto to wide angle ratios is at least 3 to 1, but is typically higher so that the cameras can be used in conjunction with binoculars to take telephoto pictures that give the same visual appearance as when the same scenes are observed through binoculars. Compactness and increased focal length are achieved via four mirror arrangements one preferred embodiment of which wraps around the camera film plane and uses a single constant angular velocity shutter for providing both wide angle and telephoto exposure times. Compact, single-use, medium telephoto cameras are also disclosed.

REFERENCES:
patent: 3791274 (1974-02-01), Hansen
patent: 4527874 (1985-07-01), Ohmura
patent: 4589748 (1986-05-01), Ohmura
patent: 4609270 (1986-09-01), Kohno et al.
patent: 4655571 (1987-04-01), Ohmura et al.
patent: 4758852 (1988-07-01), Maejima
patent: 4772903 (1988-09-01), Labaziewicz
patent: 4801958 (1989-01-01), Stoneham
patent: 4812863 (1989-03-01), Ohmura
patent: 4812866 (1989-03-01), Ushiro et al.
patent: 4833495 (1989-05-01), Ohmura et al.
patent: 4840466 (1989-06-01), Yamada et al.
patent: 5313239 (1994-05-01), Mizukawa
patent: 5473473 (1995-12-01), Estelle et al.
patent: 5502525 (1996-03-01), Mizoguchi
patent: 5576782 (1996-11-01), Kamegana et al.
patent: 5721973 (1998-02-01), Mizukawa

Affiliated with

Also associated with

Rating

Dual focal length camera does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual focal length camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual focal length camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1158585