100 x 120s unguided exposures using my ASI533 with an Altairastro 4nm Ha/Oiii filter and my Altairastro 80mm x-wave triplet refractor. First image with this combination.
All processing was done using Pixinsight. Their new gradientcorrection tool was very good as was fastbatchproprocessing. I then used BlurX, StarX and NoiseX once the stars were removed. Narrowbandnormalisation allowed me to boost the Oiii slightly.
Click on an image to get a closer view
The Crescent nebula
To my surprise, I then saw that I'd captured the Soap Bubble nebula in the bottom left. It is more visible in the starless image.
Anne Startup
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