Messier 101 is a beautiful spiral galaxy, which can be located in constellation Ursa Major. If I look back to my older picture, I must smile, how I overdone the saturation and whole post-processing. Such beautiful galaxy deserves to be re-captured and processed again:

Technical details:

TelescopeNewton 254/1000 mm
Aperture254 mm
Focal length1060 mm
MountGemini G53f
AutoguidingZWO 174MM, TS 60/240 mm
CameraZWO 071 Pro @-10°C
CorrectorExplore Scientific HR coma corrector
FiltersAstronomik L-1 - UV IR Block Filter
Exposure31x300s, Gain 94, bin 1x1,