Same Light frames (made 30.3.2019) has been processed but with new technique.
M13 – Cluster of Hercules – Brightness is 5.8 Magnitude. The cluster’s diameter is 145 light years! The distance from the ground is 25.1 thousand light years.
Photographs (March 2019) made in Zwardoń. A standard place of meetings of the Polish association of astronomy enthusiasts – Katowice dep.
Equipment: Canon EOS 6D, Sky-Watcher 200/1000 [mm] on the EQ6 Pro.
Composition: APP (10 best frames and Flat and Dark + Bias frames)
Processing: GIMP v2.10.14 + add-ons (Linux)
Lights: 10 x 57[s], ISO-1600;
Comparative photo. Left shows new processing with a new method that I use today. Right, older, processed by the old method.
Full photo with new pethod of processing.