Capturing Accurate Colors Underwater With Consumer Digital Cameras

摘要

In 1926, when Charles Martin and Dr. William Longley captured the first color photograph underwater, they had to use highly explosive magnesium flash powder to provide enough light to the hypersensitized glass plates for an exposure time of one-twentieth of a second. In those days, Autochrome glass plates were the only means of obtaining color photographs with exposure times around 12 seconds.