M17 The Omega Nebula

I'm still playing with Narrowband imaging. This is my capture of the Omega Nebula using Ha = Red, SII = Blue, and OIII = Green. 2 1/2 hours of data. I could probably have used more data but by the time I finished the guider was being blocked by the dog house. 

 From Wikipedia: 

 The Omega Nebula, also known as the Swan Nebula, Checkmark Nebula, and the Horseshoe Nebula[1][2] (catalogued as Messier 17 or M17) is an H II region in the constellation Sagittarius. It was discovered by Philippe Loys de Chéseaux in 1745. Charles Messier catalogued it in 1764. It is located in the rich starfields of the Sagittarius area of the Milky Way.

First narrow band attempt.

Since I now have the camera working well along with dialing in my polar alignment to everything is guiding better. I decided to attempt my first narrow band image. Using the Ha filter for red, the SII filter for blue and the OIII filter for green and 3 hours of data here's the results for M8 the Lagoon Nebula

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.