The Leo Cluster.Galaxy Cluster A.K.A ABELL 1367(しし座の銀河団)

Leo Cluster is not a star cluster, but the name of a cluster of galaxies about 330 million light-years distant .
Located on the north side of the lion's tail. If you look at this photo casually, it looks like a Star Field photo taken with a short forcul length, but it is a cluster of galaxies taken with a long forcul legth telescope. There are more than 70 galaxies in this cluster of galaxies.
It was my first time to photograph a cluster of galaxies with a focal length of 2000 mm, but it was an unexpectedly difficult task to recognize a small and pale galaxy as a galaxy. After all, I repeated Processing
5 times after stacking.
Still, what looks good at this level is still lacking in power.
There are several other galaxy groups and clusters of galaxies in Leo.
Rather, Leo is a constellation surrounded by galaxies.
The largest of these is the galaxy cluster Leo1, which runs from the front and back legs of Leo.
At this size, it will not fit in the FOV unless it is a 50mm camera lens. That means it is almost impossible to identify galaxies. It seems that it will end up as a mere Hoshino photograph that has no meaning to me. There is also a hand called Mosaic, but how many shots should I take?

Leo Clusterといっても星団ではなく、これは3億3千万光年彼方の銀河団の名前である。

Place: Backyard East Pattaya (Bortle Class 6, Moon Phase 6.8%)
Date:14th / Feb / 2021 2:57(UTC+7)
TS TSRC10T Carbon Truss Prime Focus (250mm F/8 f/2000mm)
L-Pro 56SubsX180sec Total 2 hours 48 minutes OSC:RGB
CCD: Canon EOS 6D (Modify)
Filter: Optolong L-Pro
Mount :iOptron CEM70G
Guide: SVbony 30mm F/4.0, ZWO ASI120MC-S
Controler: ZWO ASIAIR-Pro Dither
Pre-Processing APP
Post-Processing PI,PS
Shot By Taro Seki