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A picture is worth a thousand words. Perhaps Peter's and mine setups are slightly different as when I see the problem its in all colour channels and luminance not just blue. When I do colour combines and process I don't necessarily get blue halos but often red sometimes it is blue.
So the conclusion that its the high violet performance of the camera I would question as it does it in every channel. Hence my conclusion its the small wells as I don't see it on a deep well camera.
I also see evidence of hazy bloated stars in others' images sometimes using other brand cameras too so it obviously is something to consider when setting up a system. I don't see it in Mike's images despite using a corrector and I don't see it your images Ray using a Newt with a corrector. I do see it to a much lesser extent on the CDK with corrector but again in all channels not just blue.
Not sure what you were referring to about blue/violet halos in the TEC180/Trius/Astrodon Gen 11 images I posted in my last post as none of them have that except one with rather minor bluish halos.
Below are luminance, red green blue subs usin TEC180 Trius 694 Astrodon Gen 11 filters. As you can see the bright stars are bloated and are much the same in all 4 channels with no one channel much better than the others. I think these were 10 minute subs.
I am interested in seeing the results from different filters like minus violet etc but don't expect it to handle based on my experience. Shorter subs, perhaps a UV/IR block may help. Perhaps its stronger response in UV/IR that is doing the damage?? The bloated stars look a bit like they can go when I use my clear filter with no UV/IR block on it.
I'd also love to see some images from a FLI Microline 694 to see if there is any evidence its really the camera and its electronics - like gain settings, quality of the ADC, quality of the coatings on the CCD window and other supporting electronics that could influence the final image.
Or is it simply the small wells. I see SX quoe 18,000 electron well depth yet FLI quote 20,000+ so there is some difference right there.
Greg
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