M 27 Dumbbell nebula. New coma corrector.

I have been pretty busy lately trying new techniques with the ZWO ASI1600mm-c camera. I decided to change from the GSO coma corrector to a Baader MPCC MarkIII coma corrector. It's shorter and is more 'purpose built' for astrophotography. It has made a major difference in my images! Included in this post is one of the first images taken with the new coma corrector. From Wikipedia: The Dumbbell Nebula (also known as Apple Core Nebula, Messier 27, M 27, or NGC 6853) is a planetary nebula in the constellation Vulpecula, at a distance of about 1,360 light-years. This object was the first planetary nebula to be discovered; by Charles Messier in 1764. At its brightness of visual magnitude 7.5 and its diameter of about 8 arcminutes, it is easily visible in binoculars,[5] and a popular observing target in amateur telescopes.