Camera system with color temperature meter
AssigneeNikon Corporation
InventorTadao Takagi
Life of this patent
Estimating the term…
Abstract
A camera is equipped with an integral color temperature measurement mechanism. The color temperature measurement mechanism measures the color temperature of the light source illuminating the subject field and a display mechanism displays the color temperature information based on output from the color temperature measurement mechanism. The camera also includes a system that determines what kind of filter is recommended based on the output of the color temperature measurement mechanism and a display mechanism that displays the output of the filter determination.
Claims29
A camera assembly for photographing a subject in a field or photographic film comprising:
- a lens barrel including a photographic lens;
- and
- a body coupled to said lens tube including a photometry element that measures colors in the subject field from light rays that have passed through said photographic lens, a color temperature data conversion device coupled to said photometry element that converts the measured colors into a color temperature, a controller coupled to said color temperature data conversion device that determines an optimum exposure value based on the color temperature, a filter determination device coupled to said controller that determines a color conversion filter to be laced over said photographic lens based on the color temperature and a display coupled to said controller that displays the optimum exposure value and the determined color conversion filter.
A camera assembly for photographing a subject in a field or photographic film comprising:
- a lens means for focusing rays of light from the photographic subject;
- and
- a body means for housing photographic elements coupled to said lens means including photometry means for measuring colors in the subject field from light rays that have passed through said lens means, color temperature data conversion means coupled to said photometry means for converting the measured colors into a color temperature, control means coupled to said color temperature data conversion means for determining an optimum exposure value based on the color temperature, a filter determination means coupled to said control means for determining a color conversion filter to be placed over said lens means based on the color temperature, and display means coupled to said controller for displaying the optimum exposure value and the determined color conversion filter.
A camera assembly for photographing a subject in a field or photographic film comprising:
- a lens barrel including a photographic lens;
- and
- a body coupled to said lens barrel including a photometry element that measures colors and measures brightness of light in the subject field from light rays that have passed through said photographic lens, a color temperature data conversion device coupled to said photometry element that converts the measured colors into a color temperature, an exposure value data conversion device coupled to said photometry element that converts the measured light into a brightness value, a controller coupled to said color temperature data conversion device and said exposure value data conversion device that determines an exposure value based on the brightness value, and a single display coupled to said controller that displays information related to the exposure value and displays information related to the color temperature.
A camera for photographing an object field, comprising:
- a color temperature measurement sensor for measuring the color temperature of a light source for illuminating the object field;
- a determining device for determining filter information based on the measurement by said color temperature measurement sensor;
- and
- a display apparatus for displaying the filter information determined by said determining device.
Dependencies are inferred from the claim text.