Markarian's Chain of Galaxies and beyond

The Markarian chain of galaxies and even more field beyond them.
The finder chart and poster are courtesy of a free script for PixInsight, developed by Daniel Nimmervoll of Germany.
Note that well over 500 galaxies are revealed in this image. I chose to stop at 246.

SvBony Sv535 lens/telescope
ZWO ASI 183MC Pro camera
SkyWatcher EQ6R-Pro equatorial mount
Mele mini-computer, running APT, SharpCap and PHD2

83 x 120 second images, along with darks, flats and dark flats
Calibrated, registered and integrated in PixIsnight, post-processed in Canon Digital Photo Professional