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Message: <blockquote data-quote="Omid" data-source="post: 3453574" data-attributes="member: 16724">Hi Ron,Yes.. I am thinking something is not quite right in the way that binoculars present the perspective of distant objects. Three key factors (convergence of the axes of the two eyes, parallax after the eyes have converged, and focus or accommodation) affect the way we perceive the word in 3D. The binoculars disrupt the natural connections between these factors and so, yes, they alter the perspective. I have read a few relevant pages of the book Ed suggested but, unfortunately, 'google books' interrupts the pages it allows you to see so I couldn't quite understand the way binoculars affect parallax. I am contemplating two questions:a) If we use 10X Porro binoculars with the space between objective lenses 10 times our IPD (think WWI Trench Binoculars), would these produce perspective identical to walking 10X closer to the subject? b) How would the parallax be disrupted if we use binoculars with slightly converging or slightly diverging barrels? Could we somehow "simulate" long-baseline binocular vision with binoculars whose barrels are angled?  (I think the answer is affirmative and I have already submitted a patent on this. But some aspects still puzzle me..)PS. Thank you Ed for referring those nice books. I'll get the second one. The first one I would have to find/read at the UCLA library. The campus is not too far from me (it's in Westwood neighborhood of Los Angeles). Below are some figures from the second book. These could be useful in future discussions.</blockquote>

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