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Ongoing cloudy nights is making it hard to do any testing let alone imaging
I’ve serviced my camera
Cleaned sensor
Cleaned protective window
Replaced Desiccant
Bench tested operation and cooling , all ok
Updated all drivers and software
Cleaned my L Extreme filter
A 3 hour window last week enabled me to capture some data on M16 again but this time using Gain 100 Lower read noise ( 1.5 e-rms ) vs Gain 0 ( 3.5 e-rms )
It’s certainly not apples for apples but at least I know Gain 100 under heavy LP skies is the way to go in the future ( no more Gain 0 in Sydney)
Attached labeled images of M16 at Gain 100 and Gain 0
Same target
Similar conditions and moon
Same temp
Same length subs
Dithering
Inclusive of Cal frames ( Flats and Bias )
Same integration time approx 1hr 50 mins
Same DSS Stacking process
Just a quick Autostretch in ST
No real processing
Gain 0 is definitely noisier than Gain 100 especially noticeable in the non nebulosity mid outer regions
Further testing required but I’m confident my camera is Ok and it’s not frost or dew etc…
Bortle 7/8 SQM 18.5 is not exactly ideal for AP and a cooled OSC even with an L Extreme filter can only capture so much signal , the rest is skyglow noise and moon glare noise ….,
Cheers
Martin
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