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Message: <blockquote data-quote="Kevin Purcell" data-source="post: 1290933" data-attributes="member: 68323">Another point is to go back and rad (or read for the first time!) the huge Zeiss FL threadIt starts to get interesting in the mid-teen pages when people actually start looking through the bins <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" /><a href="http://www.birdforum.net/showthread.php?t=13239&pp=25&page=16" target="_blank">http://www.birdforum.net/showthread.php?t=13239&pp=25&page=16</a>Much arguing about edge sharpness and it's relevance (remeber to see edge sharpness you have to look off axis which actually moves your entrance pupil in an interesting way (off the axis as your eye's entrance pupil is not at the center of rotation) so it will tend to exaggerate aberations.But it has some interesting comments. I particularly like Henry Links idea of describing the softness at a given angular value of the AFOV (30 degress from the center). This at least makes the view comparable between bins (but of course hides the sharpness across the real FOV)<a href="http://www.birdforum.net/showpost.php?p=193186&postcount=390" target="_blank">http://www.birdforum.net/showpost.php?p=193186&postcount=390</a>Just an idea.</blockquote>