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Originally Posted by bird
You've probably got some bright pixels around the edge of the image you imported - try cropping the image back a few pixels from all edges and try again.
If there are any isolated bright pixels then deconvolution will turn them into a bright white point, and then the automatic histo-stretch in astra image will make the rest of your image darker.
regards, Bird
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Thanks Bird, makes sense I'll give that a try. At a loss for any other explanation, the last avis I took had no problem.
cheers,