M31 & M45 80x90s

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turfpit
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M31 & M45 80x90s

Post by turfpit » Sun Sep 01, 2019 10:52 am

Equipment: Celestron AVX mount, Altair 66ED refractor, Altair 0.8x reducer/flattener, Altair 183C V2.
Capture: 80x90s, 50 darks, 90 bias, 90 flats, unguided. Focus with Bahtinov Mask.
Software: SharpCap 3.2, FITS Liberator (to inspect test frame), Siril (calibration, registration, stacking, crop, colour calibration, green noise removal), Gimp (Curves, Saturation, Contrast).
Capture settings were RAW12, gain 200, black level 30 (black level established by using lowest value which gives centralised histogram for bias frame at gain 200) .

_M31-80x90s.jpg
_M31-80x90s.jpg (331.33 KiB) Viewed 131 times

_M45-80x90s.jpg
_M45-80x90s.jpg (297.98 KiB) Viewed 131 times
Last 10 M45 discarded due to cloud rolling in. I will probably re-process these after some sleep, there are no easy targets ;)

Dave

[ALTAIRH183C]
Debayer Preview=On
Output Format=FITS files (*.fits)
Capture Area=5440x3648
Binning=1x1
Pan=0
Tilt=0
Colour Space=RAW12
Fan=On
Temperature=12
Black Level=30
USB Speed=1
Auto Exp Target=120
Frame Rate Limit=Maximum
Analogue Gain=200
Exposure=90000
Timestamp Frames=Off
Banding Threshold=35
Banding Suppression=0
Apply Flat=None
Subtract Dark=None
#Black Point
Display Black Point=0
#MidTone Point
Display MidTone Point=0.5
#White Point
Display White Point=1
TimeStamp=2019-08-31T22:07:38.1956848Z
SharpCapVersion=3.2.6097.0

BlackWikkett
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Re: M31 & M45 80x90s

Post by BlackWikkett » Sun Sep 01, 2019 4:09 pm

Same great shots Dave. Like the color you were able to capture in M31, well done!

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turfpit
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Re: M31 & M45 80x90s

Post by turfpit » Sun Sep 01, 2019 5:07 pm

Thanks Wikkett. That was back home at Bortle 6, it will be interesting to see what the same capture settings achieve at my Bortle 4 site.

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