Patent
1990-02-12
1992-09-08
Perkey, W. B.
3541951, G03B 700
Patent
active
051462591
ABSTRACT:
An electronically controlled camera having a zoom function for changing a focal length of a taking lens and a manual function which is able to select the shutter speed by the manual operation when the camera is in a manual mode, shutter speed automatic changing apparatus automatically changes the shutter speed in the direction for reducing the changing amount of the Full-open Aperture F-number which is changed in accordance with the change of the focal length so that the exposure value becomes a predetermined value in accordance with the reference shutter speed at a time when said reference shutter speed is selected in the manual mode and said focal length is changed by said zoom function.
REFERENCES:
patent: Re29599 (1978-03-01), Ogawa
patent: 3555984 (1971-01-01), Rentschler
patent: 3917395 (1975-11-01), Ogawa
patent: 4179201 (1979-12-01), Kurei et al.
patent: 4191460 (1980-03-01), Fujiki
patent: 4285585 (1981-08-01), Numata
patent: 4329029 (1982-05-01), Haskell
patent: 4398127 (1983-08-01), Bahn et al.
patent: 4402586 (1983-09-01), Ichiyanagi
patent: 4482234 (1984-11-01), Takagi
patent: 4544249 (1985-10-01), Maemori
patent: 4777508 (1988-10-01), Aoshima et al.
patent: 4970541 (1990-11-01), Nakai et al.
Kobayashi Takeo
Nagai Katsutoshi
Nishida Takao
Numako Norio
Tabata Yasushi
Asahi Kogaku Kogyo Kabushiki Kaisha
Perkey W. B.
LandOfFree
Electronically controlled camera including automatic shutter spe does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electronically controlled camera including automatic shutter spe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronically controlled camera including automatic shutter spe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-137413