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post #23 of Old 07-27-2011
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I'm compelled to bring back the characteristics of parallax and the human perceptions related to steroscopic vision. Like many predators and those that swing from one branch to another, we have excellent depth perception. As objects become closer our brain interprets the angle from our two eyes as distance. The hawk must snatch the rat from the rock without hiting the rock. There are limitations to this perception as our eyes are close together,- oh, to be Hammerhead Sharks and know just how far away everthing is! So flip the optics around and place two light sources far apart instead of the two eyes. As you approach the lights move further apart across our range of vision. Lights far apart and high from the horizon give us more information about distance. The best information that an anchor light can provide is that you are coming closer! Take care and joy, Aythya crew
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