Crescent Nebula
The Crescent Nebula is one of the great features to be found in the constellation Cygnus this time of year. Here I have used my Borg 71FL lens and an IDAS light pollution filter designed to emphasize the H-alpha and O3 wavelengths in one go-round.
Tech Stuff: Borg 71FL at native 400mm focal length; IDAS LPS-V4 filter; Baader MPCC; ZWO ASI1600MC; 97 minutes of 12 second exposures stacked live in SharpCap Pro; iOptron CubePro 8200 mount guided with PHD; Processed with PixInsight. Imaged from my yard 10 miles north of New York City.
Crescent Nebula
The Crescent Nebula is one of the great features to be found in the constellation Cygnus this time of year. Here I have used my Borg 71FL lens and an IDAS light pollution filter designed to emphasize the H-alpha and O3 wavelengths in one go-round.
Tech Stuff: Borg 71FL at native 400mm focal length; IDAS LPS-V4 filter; Baader MPCC; ZWO ASI1600MC; 97 minutes of 12 second exposures stacked live in SharpCap Pro; iOptron CubePro 8200 mount guided with PHD; Processed with PixInsight. Imaged from my yard 10 miles north of New York City.