Messier 51CAHA, Descubre Foundation, DSA, OAUV, Vicent Peris (OAUV/PixInsight), Jack Harvey (SSRO), Steve Mazlin (SSRO), Juan Conejero (PixInsight), Carlos Sonnenstein (Valkanik)
Full resolution (0.5"/pixel)
Telescope
Calar Alto 1.2 meter Zeiss telescope.
Camera
2Kx2K, 24 um pixel SITe
Filters
Photographic RGB and 7 nm H-alpha filters from Baader Planetarium.
Exposure Time
24 hour RGB (20 min subexposures).
Processing
PixInsight Core 1.6.