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Ric, I have Meade envisage but I have never used the 'drizzle' feature. My understanding of it was that it will rotate the image at each integration to combat field rotation caused by an Alt/Az mount. Any elongation within any one individual sub frame however would not be corrected, in fact any such sub frame would be rejected unless the quality setting was made very low ie. 10% or less.
Is this not true?
hOughy, I'll put a package together and PM it to you if no better help arrives. The proceedure is very simple and might work with Gimp if you do not have Photoshop (any version from about 5 onwards should work).
You might have to manually align your corrected frames.
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