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Message: <blockquote data-quote="looksharp65" data-source="post: 1936029" data-attributes="member: 83771">I have tried to make another graphic illustration of the binoculars' 3D-area , based on the thoughts above. I cannot guarantee they conform to scientifical proofs, however. I make no claims that the drawing is according to scale or proportional.It needs to be pointed out that the 3D-area is not actually a flat area within the visual field, but rather a virtual volume with loose boundaries. a= Left barrel's FOVb= Right barrel's FOVc= Joint sweet spot of both barrels (a floating value, dependent from judgement of sharpness)d= Depth of field - another floating valueRed arrow= Direction of view (drawing shows the FOV and DOF from above)I make the assumption that not the entire joint sweet spot will provide maximum 3D clues, since a minor image separation will be diminished or hidden when the viewing angle is oblique.Furthermore, I assume that the 3D-volume expands slightly behind and in front of the depth of field, since a major image separation will overrule a minor blur.</blockquote>