Coathanger Cluster aka Collinder 399 and Brocchi's Cluster Thru Vixen 108DD astrograph at f/5 with Pentax 67 body and Fujichrome 400F slide film. 540mm focal length with about 7.5° wide field. Exposure about 20 minutes long taken in moonlight from rising waning Moon. Thus the blue sky which has been emphasized rather than neutralized. Taken July 2003 from home.
The asterism known as the Coathanger, aka Cr 399, in Vulpecula, at upper right here. The faint blue reflection nebula above it is Sharpless 2-83; the small reflection nebula at bottom is Sh-2-82. The small open cluster off the left tip of the Coathanger is NGC 6802. The Coathanger asterism is a fine one for binoculars. The 7.5 x 5° field is close to a binocular field of view. This is a stack of 12 x 6-minute exposures with the SharpStar 61mm apo refractor at f/4.5 and with the Canon R6 at ISO 1250. Taken from home Sept. 30, 2021. Diffraction spikes added with Astronomy Tools actions.
Several types of deep-sky objects are represented here: an emission nebula, dark nebulas, and star clusters, in this rich field in Cygnus. The field frames the bright and magenta Cocoon Nebula (at lower left), aka IC 5146, at the end of the dark nebula B168, aka The Dark Cigar, which itself is southeast of the bright but sparse star cluster Messier 39 at upper right. The field is also wrapped in faint red emission nebulosity. A dimmer smaller star cluster, Platais 1, sits above M39. This is a rich field about 6° by 4°, embedded in the main band of the Milky Way in northern Cygnus. This is a blend of: a stack of 8 x 6-minute exposures at ISO 1600 through a clear Astronomik UV-IR cut filter, layered with a stack of 11 x 12-minute shots at ISO 2000 through an IDAS NB1 narrowband filter for the red H-alpha nebulosity. All were with the 76mm SharpStar apo refractor with its matching flattener/reducer for f/4.4, and with the red-sensitive Canon EOS Ra camera. Autoguiding and inter-frame dithering was with the MGEN3. No darks or LENR were applied here on this cooler autumn night. All stacking, alignment and blending with Photoshop. I brought out the faint nebulosity with the use of luminosity and color range masks created with Lumenzia and Zone System Express 7. Diffraction spikes added for artistic effect with Astronomy Tools Actions. A mild Orton glow added with Luminar AI for fun.
