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Message: <blockquote data-quote="henry link" data-source="post: 3534570" data-attributes="member: 6806">Thanks for posting the photos Frank.If I'm interpreting the appearance of the prisms correctly the long first prism looks like a 45º Amici roof prism for image erection, followed by the beamsplitter, which diverts half the beam to the left eyepiece through a diagonal prism and a simple glass cube (for keeping the glasspath equal between right and left). The right side appears to be two diagonal prisms with the second one movable in a lateral direction to change IPD.The most interesting thing to me is the apparent use of an Amici prism. If that's what it is (I don't know what else could be that shape) this is the first time I've seen one used in a spotting scope.Henry</blockquote>