Quote:
Originally Posted by h0ughy
Well i feel as thought it is the dogbowl shot with the curvature in the field. Still working on the 8" so i stuck with the 127Ed and the Wo 0.8 reducer. I really need to sort this out - somehow this must work? Anyway it is of 3 hours and 32 minutes duration of wasted effort from last night and this morning guiding and pushing the camera at 4 degrees and iso400 - and not using a LP filter the shots were 3minutes each.
so i did two versions processed in pixinsight and a tweak with special herbs and spices- not happy with either to be honest  |
David - which WO flattener are you using? I have a FLAT2 and 3 and find neither of them works very well on the 127 - in fact the Canon20D works better with no flattener in line.
I think there is under correction as your corner stars are
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If I have this right this means the sensor needs to be further from the corrector - try a small spacer. If you get stars in the corners like this:
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you are over corrected and you need to get closer unfortunately that is tricky to achieve with a DSLR.
How do your images look with no corrector in line? (BTW it is not a crime to crop a little if your field is not flat all the way to the corners)
Finally you may also get a better result by focusing on a star 1/2 way to the corner not one dead centre on the CCD as this will balance the focus better.