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Old 18th July 2009, 08:46 AM
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RobF RobF is offline
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has anyone tried using parallax error to rangefind? i was just wondering if you can use the mildots against the shift to measure... if you move your head from side to side, from the extreme of losing the image, getting it and losing it again, there should be a movement of the image against the ret... and could this be measureable?

funny enough, owls do this head bobbing (and some other birds of prey), because they have very narrow field of view that is almost monocular, and find judging distance difficult, so they head bob to see the parallax shift of their target against a background
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