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Originally Posted by seeker372011
Hi Humayun
After dark subtraction, division by a flat and usual pre-processing in IRIS(ie conversion from RAW etc etc), I used the COREGISTER3 command (the COREGISTER2 command failed for some unknown reason) to align the frames two at a time and the ADD command to add the frames together
I did an ASINH stretch but it didn't seem to make too much difference so I simply took the stacked image to photoshop
In Photoshop I set black point, stretched levels slightly,
Finally subtracted an artificial flat field (duplicate the original image, clone stamp out any bright stars, blur like crazy, then subtract image from original using the Apply Image command in Photoshop) to get rid of some residual vignetting before running the image through Neat Image using default settings
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Thanks for your explanation, Narayan. I will bear these tips in mind next time I try shooting things.
Regards,
Humayun