Issue   1    Tip 2 Color Where to start… Physics! Understanding refraction and absorption.  The light spectrum from Red to Violet. When entering the water column, you will notice one of the first colors to disappear is red. Red or green/blue are common filter colors to compensate for the loss of a spectrum of colors lost by water absorbing the wavelength of that color. For example, if looking through the lens with a red filter, from 5 feet of depth things will appear reddish. Continue down the water column and that red you see begins to disappear and the objects begin to appear more natural in color. Red or something close to red is a very common filter. Looking at the graph on the right ->> you see at around 15 feet, you begin … Read entire article »