Deep Sky SH2_184

Tracy

Tracy

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Gain:   101
Offset:   50
Exposure Time:   240 seconds
Camera Temp:   -5 °C
Filters:  
  1. Ha
  2. OIII
  3. SII

Camera:   ASI533MM Pro
Just some old data from my first captures of SH2_184 with the William Optics EQ-35 Pro that I was always battling with to keep the RA/DEC tracking reasonable.
Very minimally processed in PixInSight.

SH2_184.jpg
 
OhNo

OhNo

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Not bad. Rather than a guiding issue I'd say you had a Focus issue. While I haven't seen you guiding numbers I can see the trailing isn't bad at all, but the focus looks soft seeing as the stars are fuzzy.
 
Tracy

Tracy

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OhNo said:
Not bad. Rather than a guiding issue I'd say you had a Focus issue. While I haven't seen you guiding numbers I can see the trailing isn't bad at all, but the focus looks soft seeing as the stars are fuzzy.
Click to expand...
I'm pretty sure those captures were during a period that StellarMate OS focuser was having some issues, that are supposedly now "fixed".
What I currently do is a manual focus after each filter capture run (well, not really manual, use the auto-focus then check it with the Bhat mask). I have found that the SHO runs are pretty much spot on with my red filter.
 
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