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Andrew I might be wrong, but brightness seems to have little effect on the image quality. So having it up high will give you a false reading and thereby an underexposed image. Strange that you should get overexposure with these settings. A lot of guys on CN swear by having brightness really low. Anyway I have found it works, just need to get my focus and collimation right, and jag a night where the seeing is really good. I suspect that collimation is a slight factor. It only needs to be 128th of a turn out and I would get these sort of images. Really frustrating. Any tips on collimation?
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