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Message: <blockquote data-quote="OPTIC_NUT" data-source="post: 3194009" data-attributes="member: 121951">Note on the odd geometry of the Diascope:  The purpose of that is mainly for CONvergent axes.  The problem is that Galilean binoculars of more than 3-4xhave a field of view that is so narrow that none of the field is shared going pretty far out.  To see a bird on good stereo at 30 ft, for example, you would need to tip the barrels in toward each other. And...so they do.Think of it as an odd very-narrow-field version of the Papilio.I have a long-barreled pair of 7x50 Porros with only 5 degrees view.Very sharp, but at even 50 ft, the field-split is quite noticeable.It's pretty painful at 30 feet.I think that also means this:Extra-wide binos are more stereo and more comfortable close in. 11-degree Roofs would be awesome.</blockquote>