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The correct answer... as far forward as your eye can still see the red dot.
The reason? It's a simple geometry. By moving the red dot sight forward, you decrease the possible angle of your eye to the zero of the red dot sight. That translates to faster target acquisition time.
Try drawing out the eye (as a point source), the collimating mirror, the dot on the collimating mirror, and the target on a piece of paper. Move the dot and the collimating mirror back and forth. You'll see that you would be able to use more of the mirror, for the scene, when it's further away from your eye.
Sat, 05 Oct 2013 14:34:00 +0400
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