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Message: <blockquote data-quote="Dale Forbes" data-source="post: 1768802" data-attributes="member: 65117">Hi Calambres,As far as I (not an optical engineer) understand, you are seeing CA at the image edge in the Swarovisions for two reasons:1. as you move your eye ball out to look at the outer edge, you are moving the position of your eye, meaning that you are more likely to have your eye ball out of the optimal image plane. The further your eye is out of this optimal image plane, the more CA you are going to see. You might find that shifting the position of your eyes just slightly would remove most of the CA.2. the sharper the edge, the clearer any image distortions are. The Swarovisions are certainly no poorer in CA than any other alpha binocular. The great difference is that if you only have a small sweet spot then the CA happening at the edges is blurred out to an extent where it is not/barely visible/perceivable.Calambres, are you still enjoying them?Happy birding,Dale</blockquote>