The Jellyfish Nebula (クラゲ星雲) SH2-248

Originally, if this target uses HSC6, it would be better to use a sensor with a larger FOV than MFT.
The IMX585 is a bit cramped.
However, since the blue color appears as expected, Lower's may need the second emission line of Oiii or Hb.
This time, the IMX585 increased the Gain from 180 Unity Gain to 70% 360 and shot.
The exposure of 5nmDuoFilter+F/2+Gain70%+180 seconds was completely overexposed, and the bright stars at the legs of the jellyfish were completely saturated and affected by the amazing Halo. Even StarXterm did not recognize it as a star. The mask calmed Halo down a bit, but it did little more than dim the saturated stars.
Two minutes seems to be the limit for shooting with this combination.

本来このターゲットはHSC6を使うのであれば、FOV的にMFT以上のセンサを使った方が良いのであるが、昨日撮ったLower's nebulaの青の問題の究明をしたくIMX585で撮影してみた。
今回IMX585はGainを180のUnity Gainから70%の360に上げて撮影してみた。

Place: Backyard East Pattaya (Bortle Class 6, Moon Phase 0.3%)
Shot Date 22nd / Jan / 2023 22:55 (UTC+7)
Celestron C6 + Hyperstar C6 V4 (150mm,F/2.0,f/300mm)
filter: Antria Gold Hight Speed DuoA
Gold:40X180Secs 120minutes
Total 2 hours
Palette: Target :HOO(False)
Gain: 360(70%) BIN1
CCD:Playerone  Uranus-C (IMX585)
Mount :iOptron CEM70G
Guide: iGuider in CEM70G (Dithering every 5 shots)
Pre-Processing APP Drizzle None
Post-Processing PI,PS
Shot By Taro Seki