Only slightly OT In the 1970`s at NBC, in Burbank, Calif. sat one young man looking at two walls of tv monitors. As every human sees color slghtly differently...in addition to male/female differences his eyes saw about what a good cross section of the public would call average. That one young man was observing all NBC programming for over 30 days as yet un-aired. He would say [in a clear voice] for example, "number 33 soften the blue in the dress, or number 17, brighten the red tablecloth, etc. So , what we all saw on the West Coast whether to be broadcast in the West or beamed East depended on one young man`s eyes. Then the individual viewer at home could intensify or dim, sharpen, or contrast at will..but based on the average. Probably all done by computer in the New Days. This young man came up to Griffith Observatory where my husband worked and I quizzed him about even the hint of colors he saw when looking through the roof scope. But, alas, just the same white fuzzy dots we all saw. Thanks for the memories! Jan Seeberg Vancouver Sidewalk Astronomers USA