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Message: <blockquote data-quote="Omid" data-source="post: 3633852" data-attributes="member: 16724">"zoom vision" is an interesting concept. It is curious that no animal - as far as I know- has zoom vision. There are insects with multiple eyes but there is no creature with zoom vision. Zoom is also an interesting concept in sports optics: Binoculars could definitely benefit from zoom but since it is very difficult to keep magnification the same in both barrels, very few zoom models have been made.On the other hand, zoom is very easy to implement in rifle scopes since they use erector lenses instead of prisms. But that's actually not so useful and could be distracting the hunter (if you leave your scope at high zoom, you can't find the target and by the time you figure this out and reduce zoom, the game is gone!) Also, it causes problems with where the reticle should be (first focal plane or second focal plane). The correct solution here is a "dual-sight", one with low power and one with high power. (I have several patented inventions in this field)Now, one area that zoom is useful and it has also been implemented too is spotting scopes. -Omid</blockquote>