Atik 320e with duoband filter on Altairastro 60EDF on Ioptron CEM60ec mount.
6 x 900s subs, stacked and processed in Pixinsight. I did apply Astroflat Pro in Photoshop which had the added bonus of removing remaining background noise.
This image really needed twice as much data at least as the target is faint and strong stretching is used to bring it out.
Click on the image to get a closer view
The Cave nebula
Anne Startup
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