NGC 7000 - The North America Nebula

During the later part of November when we had some nice run of clear, moonless nights, I imaged a lot of DSOs (Deep Space Objects).  Finally got around to processing NGC 7000.

The North America Nebula (NGC 7000 or Caldwell 20) is an emission nebula in the constellation Cygnus, close to Deneb (the tail of the swan and its brightest star). The remarkable shape of the nebula resembles that of the continent of North America, complete with a prominent Gulf of Mexico. It is sometimes incorrectly called the "North American Nebula". The North America Nebula is large, covering an area of more than four times the size of the full moon; but its surface brightness is low, so normally it cannot be seen with the unaided eye. Binoculars and telescopes with large fields of view (approximately 3°) will show it as a foggy patch of light under sufficiently dark skies. However, using a UHC filter, which filters out some unwanted wavelengths of light, it can be seen without magnification under dark skies. Its prominent shape and especially its reddish color (from the hydrogen Hα emission line) show up only in photographs of the area. The portion of the nebula resembling Mexico and Central America is known as the Cygnus Wall. This region exhibits the most concentrated star formation. (Wikipedia)

NGC 7000  -  November 20, 2017
EdgeHD11 w/Hyperstar and QHY10 Camera
30x180sec subs at f/2

I had imaged this object with my William Optics 102mm APO, but the EdgeHD11 with Hyperstar lens really pulls out the detail.  There is however, some issues with my setup of the Hyperstar.  If you look closely at the top left of the image the stars are actually small donuts; at the bottom right they are pinched. I'm pretty sure this is an issue with the camera not aligning properly to the Hyperstar lens; something which I have struggled with in the past to correct.