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Message: <blockquote data-quote="Steve C" data-source="post: 1561134" data-attributes="member: 56622">Actually the resolution specs from Zen Ray for the x43 ED 1 and 2 is for 3.2 arc seconds.  It is 4.0 on the 7x36.  As Ron points out, and Z-R confirmed, 4.0 is as good as it gets @ 7x36.  However anything approaching 4.0 can be pretty good.  I know Ron posted some resolution specs for his Promaster ELX ED, which are speced at 3.6 arc seconds.  I do not recall similar posts for any of the other ZEN type ED's.  Not that they aren't there.Edit, that 3.2 is peak performance.  Like anything maybe best not really taken too literally.  SteveM may be right about something in the order of 4.0 to be actual.  But I don't know which he was posting about.  Again if we can get to an actual 4.0 or so, the image can be excellent.</blockquote>