Hello everyone sorry for such a question but is there anyway I could get some help with some data I captured tonight of the North American and Pelican Nebula? I cant seem to get rid of the horrible color casts from the filter IDAS D2 which is front mounted on my 200mm zoom lens with step down rings . I have been imaging for about a year now and I cant seem to figure it out.. Every image I try to process is this horrible mess of green in the middle and magenta around the outsides no matter if I run AstroFlatPro it doesnt do a really good job.. I guess what im asking is if someone with sophisticated software like Pixinsight can try out my images and see if its me or if its the subexposures that are not good.. Here is an example of my stacked image after a few stretches on Photoshop. No calibration files were used. I tried to do flats but I must not be doing it right because they overcorrect and then I get bright green all around the edges where the magenta is. Maybe I just need more practice can anyone recommend a good place to learn astro processing?
Thank you. - Joe