Color correction filter and method of taking underwater photographs therewith
OwnerKirk Kreutziginventor
Life of this patent
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Abstract
A color correction filter is disclosed, which is especially adapted for use in underwater photography. The filter has a transparent element which passes impinging light wavelengths as follows: ______________________________________ % incident light Light wavelength, nm transmitted ______________________________________ 400 25 450 12 470 8 500 4 520 7 570 50 600 87 700 90 ______________________________________ A method of taking underwater photographs utilizing this filter is also disclosed. The method includes causing daylight to travel through seawater to the subject, and reflected light from the subject to the camera, over a total distance of less than about 50 feet.
Claims11
A color correction filter for use in underwater photography, comprising, in combination, mounting means for mounting the filter to a camera to be used underwater, and a transparent element secured to the mounting means and passing impinging light wavelengths as follows:
- ______________________________________ Light % incident light wavelength, nm transmitted ______________________________________ Below 370 0 400 25 410 27 450 12 470 8 500 4 520 7 550 18 570 50 600 87 700 90. ______________________________________
A color correction filter for use in underwater photography comprising, in combination, mounting means for mounting the filter to a camera to be used underwater, and a transparent element secured to the mounting means and passing incident light wavelengths as follows:
- ______________________________________ % incident light Light wavelength, nm transmitted ______________________________________ 400 25 450 12 470 8 500 4 520 7 570 50 600 87 700 90. ______________________________________
A method of taking underwater photographs comprising the steps of placing a light filter between a photographic subject and photographic film in association with a camera and lens, placing the camera, lens, and filter in cyan water at a depth of from about 8 feet to about 50 feet, causing daylight to travel through the seawater to the subject, and from the subject through seawater and through the filter and lens, filtering the light wavelengths passing through the filter as follows:
- ______________________________________ % incident light Light wavelengths, nm transmitted ______________________________________ 400 25 450 12 470 8 500 4 520 7 570 50 600 87 700 90 ______________________________________
- and causing the filtered light to impinge upon a color-responsive material.
Dependencies are inferred from the claim text.