Found a nice photo of NGC 2158 shot with ASTRA Remote Telescope #2 by Maurizio Balsamini and to train my memory a little I decided to process it with IRIS and see if I still can do some editing.
This is the mean of two frames for Luminance than combined with RGB frames, unfortunately I didn’t find any calibration frames to add to the final image to reduce noise and hot pixels.
All the rights go to ASTRA Remote Telescopes and Maurizio Balsamini for taking this beautiful picture of this cluster.