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Further update on edge performance. Had a brief chance to try it out in my SV80ED f/7 refractor tonight.
At 7.2mm, I let Saturn drift out of the field and the image was reasonably sharp until Saturn's leading edge reached the field stop. There was a small amount of lateral CA visible from around the 90% mark, and a minor loss of sharpness, e.g. the Cassini division was difficult to pick out. Casual observers would likely not notice, as the effect is similar to moments of poor seeing.
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