StargeezerTim Posted January 7, 2017 Share Posted January 7, 2017 Hi all, I need to fix up coma in the corners of my images (try as I might, I cant get the optics spot on). I have been trying the offset filter with darken mode (Photoshop) as described here and elsewhere with mixed success. I find I can get round stars with, say, a 2 and 1 pixel offset, but that the background is darkened slightly. If I apply levels or adjust the brightness of the the corner layer, I can equalise the background but lose the star changes. here is an example to show the change in background:- Does anyone know of a way of adjusting the background without losing the changes? Thanks in advance... Tim. Link to comment Share on other sites More sharing options...
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