M 101 The Whirlpool


Gary Opitz

Rochester, NY

Telescope Engineering Company 140 APO refractor
ZWO ASI1600MM mono camera with filter wheel
ZWO LRGB filters
80 mm Orion Shortube guiding refractor
Orion Starshoot Autoguider camera
Orion Atlas mount

This is an LRGB image of Messier 101 taken over three nights in April, 2018 with a total exposure of 7.25 hours at f/7.
Acquired with Sequence Generator Pro, processed in PixInsight and Photoshop.