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Message: <blockquote data-quote="Tom Bombadil" data-source="post: 3193472" data-attributes="member: 33331">Not rare, but one must be careful.   Off of the top of my head, I'd guess that about 1/3rd can go to 74-75.   The 8x32 SE has a max IPD of 74.1mm.  The M7 8x30 is 73.2mm.  The 8x42 EDG opens way up to 78.1mm.  The 10x35 EII is 74.This reminds me, I did try the M7 8X30 and it was just a shade less than I needed.  I hadn't put 2+2 together to realize that it has the same max IPD and same exit pupil size of the EII.  Some of the older porros opened to just 71mm.  I believe most of Nikon's Action and Aculon porros are spec'ed as having a max IPD of 72mm.</blockquote>