M51 - The Whirlpool Galaxy
Shot March 31, 2019, sky Bortle 8 with avereage seeing.
Telescope: ES127ED apochromatic refractor
Camera: ZWO ASI183MM Pro
ES .7 focal reducer/field flattener
83 minutes of LRGB with Optolong filters. Processed in Pixinsight and Photoshop.
This was the first deep sky target I tried, several years ago. It's two interacting galaxies about 25 million ly away in Canes Venetici.