DSO Imaging Problem
Posted: Thu Jan 20, 2022 8:40 am
Really hoping someone can advise here.
First real attempt at Pleiades with new equipment and there appears to be a couple of issues.
Equipment:
♦ Star Adv Pro mount
♦ Skywatcher Evostar 72-ED DS Pro
♦ Zwo ASI 193 Pro C
Before I begin, I'd need to say that daytime focus is fine - I've set the scope targeted at some trees around 1mile away and the branches are nicely in focus.
The problem I'm having is image quality/focus? (see 1st attachment).
I've tried every combination of the adapters with the Zwo camera - both with/without the 90°
and until I added those extra two adapters (2nd attachment) I couldn't get even remotely close to focus - the focusing knob being almost completely closed. The two adapters currently attached provide the 55mm backfocus, but the focus is still slightly off.
I've been capturing Raw16 tif format and pasting these into Deep Sky Stacker to produce an autosave.tif for later processing in PS.
Ideally, I'd like to get some nice crisp stars M45 in colour and be able to stretch the levels and curves. Sharpcap Capture settings are below.
thanks for any help/advice.
++++++++++++++++++++++++++++++++++++++++++++++
[ZWO ASI183MC Pro]
Debayer Preview=On
Pan=0
Tilt=0
Output Format=TIFF files (*.tif)
Binning=1
Capture Area=5496x3672
Colour Space=RAW16
Hardware Binning=Off
High Speed Mode=Off
Turbo USB=100
Flip=Both
Frame Rate Limit=Maximum
Gain=170
Exposure=13.020474
Timestamp Frames=Off
White Bal (B)=57
White Bal (R)=59
Brightness=25
Temperature=6
Cooler Power=74
Target Temperature=-28
Cooler=On
Auto Exp Max Gain=66
Auto Exp Max Exp M S=1969
Auto Exp Target Brightness=73
Mono Bin=Off
Banding Threshold=19.424778761062
Banding Suppression=2
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
Notes=
TimeStamp=2022-01-20T07:47:31.9342172Z
SharpCapVersion=3.2.6480.0
First real attempt at Pleiades with new equipment and there appears to be a couple of issues.
Equipment:
♦ Star Adv Pro mount
♦ Skywatcher Evostar 72-ED DS Pro
♦ Zwo ASI 193 Pro C
Before I begin, I'd need to say that daytime focus is fine - I've set the scope targeted at some trees around 1mile away and the branches are nicely in focus.
The problem I'm having is image quality/focus? (see 1st attachment).
I've tried every combination of the adapters with the Zwo camera - both with/without the 90°
and until I added those extra two adapters (2nd attachment) I couldn't get even remotely close to focus - the focusing knob being almost completely closed. The two adapters currently attached provide the 55mm backfocus, but the focus is still slightly off.
I've been capturing Raw16 tif format and pasting these into Deep Sky Stacker to produce an autosave.tif for later processing in PS.
Ideally, I'd like to get some nice crisp stars M45 in colour and be able to stretch the levels and curves. Sharpcap Capture settings are below.
thanks for any help/advice.
++++++++++++++++++++++++++++++++++++++++++++++
[ZWO ASI183MC Pro]
Debayer Preview=On
Pan=0
Tilt=0
Output Format=TIFF files (*.tif)
Binning=1
Capture Area=5496x3672
Colour Space=RAW16
Hardware Binning=Off
High Speed Mode=Off
Turbo USB=100
Flip=Both
Frame Rate Limit=Maximum
Gain=170
Exposure=13.020474
Timestamp Frames=Off
White Bal (B)=57
White Bal (R)=59
Brightness=25
Temperature=6
Cooler Power=74
Target Temperature=-28
Cooler=On
Auto Exp Max Gain=66
Auto Exp Max Exp M S=1969
Auto Exp Target Brightness=73
Mono Bin=Off
Banding Threshold=19.424778761062
Banding Suppression=2
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
Notes=
TimeStamp=2022-01-20T07:47:31.9342172Z
SharpCapVersion=3.2.6480.0