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Message: <blockquote data-quote="613Orm" data-source="post: 3222569" data-attributes="member: 107876">It seems IPD related. I did this test with the Eii, and it helped, the difference between center and peripheral sharpness disappeared. On the Granite it somewhat decreased the diameter of the zone of less sharpness/contrast in the center, but the negative effects of too much increase in IPD took overhand before I could enjoy any complete disappearance of the sharpness difference.Nevertheless, my granite is pretty sharp in the center, and I´ll get used to move the object off center if I need it even sharper.</blockquote>