In the past week I’ve worked on collecting data on some dark nebulae in Cepheus: B161/162/163 and others.
My setup now has an AstroPhysics CCD67 focal reducer in the optical train, which means I’m working at a focal length of about 1225 mm, and a focal ratio of about f/5.54. The telescope was also collimated better, and I only have a slight residual tilt, almost invisible.
This image is a simple LRGB composition, in a 2-panel mosaic with a total integration time of 17 hours.
Please note: no noise reduction was applied!
The dark nebulae appear in a vast field of red hydrogen emissions, which is known as the IC1396 complex.
The image can be seen on AstroBin as well.