First project of 2020/2021 astrophotography season

The Crescent nebula ngc6888 In Ha and O3 bicolor

Imaged on Aprit 31th + 1-3, 6-7 and 12-13 of September 2020 with ASI1600mmc at -20C and using 300 gain and 50 offset

A total of 137 minutes of Ha subs + 117 minutes O3 subs makes this a 4h and 14m min integration.

Hope You Like, Clear skies /Magnus_e



PS, I could only upload 4mb image, this is normal? Original jpeg image is 13mb and png is 30mb

That is very nice, which scope are you using please?

This is the SkyWatcher Equinox 80 pro apo (500mm focallength)
It has the skywatcher field flattener, that I do not like. I'm not sure if I have issues on how it's mounted, but my corner stars are not round.
Initially I was using it with my diy modded eos 550 dslr, and I was thinking that I might have mounted the sensor slanted. But its the same with this camera.
Stars on the upper and lower left point towards the center, while the right stars point towards the middle height-wise, but straight up and down. Think this can be an issue with the FF autocentering connection.

Camera is ASI ZWO 1600mm-cool
Also Mount is Celestron AVX.