Photography – Exposure control circuit – Color temperature compensation or detection
Patent
1997-09-09
2000-05-30
Perkey, W. B.
Photography
Exposure control circuit
Color temperature compensation or detection
396292, G03B 708, G03B 1718
Patent
active
060700181
ABSTRACT:
A camera is provided in which light entering from an object field through a shooting lens is reflected by reflective mirror, and an image is formed on a focusing screen. The light that forms the image is reflected in a pentaprism, and forms an image on an eyepiece lens. Photometry is performed on each light component of the light that left from the pentaprism through the photometry lens by a photometry element and color information from the photometry value is computed in a CPU. Looking through a finder the color information is displayed, having been computed by the CPU at a color information display apparatus. A user can see the display in the finder through the eyepiece lens. Also, a camera wherein when a photographer either presses a release button half way down or all the way down, the CPU performs an exposure calculation and calculates the aperture value and the shutter speed for appropriate exposure. It then detects the status of a selector dial and performs various calculations and displays various information, including shutter speed, exposure revision value, ISO sensitivity, CC factor, LB factor, color temperature, in multiple component displays according to the mode selected. Further, apparatus, e.g., a camera, a colorimeter, etc. enables simultaneous display of various color information for various types of photosensitive materials.
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Nikon Corporation
Perkey W. B.
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