I often love finding the background galaxies in an image that is dominated by one main target. This image of the Hercules Galaxy Cluster celebrates those minor-roles. Almost all the galaxies in this cluster appear to be interacting, making them especially interesting.
I used a Celestron Edge HD 925 with a 0.7 reducer, an ASI 2600MC Pro. I managed to get 21 hrs 30 minutes total exposure time, with 258 x 300s subs. I processed it in SiriL, Starnet, GIMP & G'MIC.