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- WHAT IS TRI-COLOR? -
- Color films have three separate layers of emulsion - a red, a green, and a blue. Absorbing various degrees of only these three colors of light, they can create the full spectrum of colors that we see.
In the tri-color photographic process we use, the same subject is shot three times, each time on black & white film through a different color filter (red, green and blue). Each negative is then scanned (digitized) and combined using a computer making them equal parts of a final color photograph.
The result is a full spectrum photo like color film except a truer balance of the three color layers can be achieved over long exposures than with color film. Also a high contrast and fine grain black and white film can be used to help maximize fine detail. The typical combined exposure time for the three tri-color negatives using our 16" f/4.5 newtonian telescope is 5 1/2 hours.
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