This is the first time I have combined images from entirely different sessions, in this case, one was a CMOS CFA sensor and the other was a mono CCD. Interestingly, I used the CMOS CFA with both UV/IR blocking filters and a dual-narrowband filter. The stacks from each were very similar (with not dissimilar noise levels for equal integration time). If I’m imaging galaxies, I don’t think I will bother with DNB filters again unless there is significant nebulosity. This is a very challenging galaxy to process well. I cannot get even close to a lot of web images and I am convinced that these are using non-visible wavelengths too.
Total imaging time exceeded 50 hours. [updated image - with a different treatment of the red channel]
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Gorgeous!
Mark
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Cracking image. You are right, it’s a tough target. Which CCD camera did you use?
QSI 683wsg and QHY247C with a GSO 10-inch RCT. 15 years between sensor technology.
If Sony ever release a mono version of the sensor in the 247 …
I know what you mean. We long focal length people have been left in the wilderness a wee bit.
Far out! That is very nice. 