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That's a lovely image and I agree with many of the posters that is one of the best images of this difficult target.
Looking at the full rez though, there is something odd in the bottom left corner - a dark corner. That maybe just a sub that was rotated. Also looking at the image it gives the appearance of bowing out in the centre, curvature.
Something to consider when evaluating the coma corrector's performance rather as well as roundness of stars in the corners. Which gives the flatter field. That is something the FSQ is so good at, such a flat field. At first it almost seems odd as we get used to curvature.
I am only being so picky as you are evaluating your gear as it does not detract from the fabulous image.
Greg.
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