This image was taken last night (17/18th May, from around midnight).
Image details: 120seconds x 40, Stacked in Siril with Darkframes; basic stretch in Gimp
Scope: William Optics Megrez II 80mm with SVBony SV209 0.8X Reducer/Flattener
Camera: Zwo Asi533mc Pro, cooled to 0degC
Filter: SVBony SV220 dual narrowband Ha/O3 filter
Mount: iOptron CEM26
Guidescope: SVBony SV165 (120mm FL, F4) with Zwo Asi120mm guidecam
Control: Asiair Mini
M20 (Trifid Nebula)
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bernardchew
- Posts: 52
- Joined: Fri Nov 28, 2008 2:51 pm
- Location: Bedok Reservoir
M20 (Trifid Nebula)
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Re: M20 (Trifid Nebula)
Hi Bernard,
I would not have thought it would’ve been clear to do imaging last night. How clear was it?
cytan
I would not have thought it would’ve been clear to do imaging last night. How clear was it?
cytan
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bernardchew
- Posts: 52
- Joined: Fri Nov 28, 2008 2:51 pm
- Location: Bedok Reservoir
Re: M20 (Trifid Nebula)
Pretty clear after 11pm except areas within 20 deg of horizon. Small clouds floating by from time to time but this didn’t interfere with area of interest. I tried Galaxy imaging from 10pm - midnight, but that didn’t turn out well. High level scattered clouds and quarter moon nearby reduced the contrast. Also, most targets of interest were approaching meridian which interfered with guiding - asiair just stopped tracking and waited for proper time to do meridian flip sequence. So I decided to switch target to m20 in Sagittarius and test out nebula imaging with dual band filter instead 
. Pretty happy with the result, which was my first serious attempt with this type of target.
. Pretty happy with the result, which was my first serious attempt with this type of target.