1978-10-17
1981-03-17
Hartary, Joseph W.
350422, G03B 1310, G02B 1502
Patent
active
042563968
ABSTRACT:
A camera having at least two objective lenses of different focal lengths, which can be selectively externally manually positioned in the camera photographic optical path includes an inverted Galilean viewfinder optical system consisting of a front negative, divergent lens group and a rear positive, convergent lens group. The divergent lens group consists of two concave lenses which are transferrable between a first position providing a low magnification and a second position providing a high magnification. In the first position both concave lenses are in the viewfinder optical path and the other concave lens remains in the viewfinder optical path and is shifted to a second position axially spaced from its first position along the finder optical axis.
REFERENCES:
patent: 2900887 (1959-08-01), Nerwin
patent: 2906172 (1959-09-01), Klemt
patent: 2917969 (1959-12-01), Tatuo Nojiri
patent: 3665834 (1972-05-01), Loewe
patent: 3890626 (1975-06-01), Ettischer
patent: 4038673 (1977-07-01), Schoder
patent: 4104663 (1978-08-01), Yamazaki et al.
Kawaguchi Taizo
Kobayashi Haruo
Hartary Joseph W.
Minolta Camera Kabushiki Kaisha
Tarcza Thomas H.
LandOfFree
Camera viewfinder device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Camera viewfinder device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Camera viewfinder device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1643398