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I use a combination of layers (with masks) and "Curves", only using Levels to chop the extremes.
If you can get the whole thing in to photoshop as a 16bit file (16bit TIF) then using curves is quite easy. My problem is converting a FIT to a 16bit TIF. All CCDSoft will do is 8bit TIF or 48bit TIF, my photoshop can't read 48bit TIF and 8bit TIF is too "shallow".
To combat that, I save about 3 TIF's, use curves on each and merge them with layers.
I have often wondered if something like ImagePlus gets around this, if it provides curves etc for use directly on the 16bit FIT files.
Oh, and it's a bit of a tricky trial and error process to get the brightness evenly spread but not make it look fake or have 'dead patches' of brightness where it looks obvious it shoudl be brighter. The M42 example at the previously posted link is OK but to me the core needs to be a bit brighter, because it should be.
Roger.
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