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I dont have software to do it, and have used a hartman mask.
The only system I use is to take a test shot, blow it up on the LCD and examine the blow up with a magnifying glass.
I have just fitted a better focuser (crayford) to my imaging scope and after tests last night I think this will help greatly as with the new focuser I dont get any slop if I go in the other direction,which was a major problem with the old focuser.
Also after a while I think you develope a "feel" for just where you are... but the more you do it the better you get at it..
I have taken up to 40 test shots examined each one and even then felt as something better could be reached...
alex
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