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Here is what I am having trouble with - see image below.
Note the odd diffraction spike on the stars, the fuzzy delineation, the blue blotching right across the field (this is cropped - doesn't show much of the awful vignetting).
I took flats this morning (nothing moved), and they did not help much at all - it's like there was a transient issue - like frost - which cleared. The prior imaging run on NGC 3132 shown in the imaging section did NOT have these issues (yes, the seeing was average).
I can't so much more with this image (3 hrs), especially colour/saturation as anything further really starts showing up BADLY due to the odd blue blotching (this is all after DBE and BE in PI, plus some other tricks).
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