NGC 7635, also known as the Bubble Nebula + Massimo Di Fusco + L-Para, L-QEF

NGC 7635, also known as the Bubble Nebula

Credit:  Massimo Di Fusco

Filters: Optolong L-Para, Optolong L-QEF

 

 

NGC 7635 (also known as the Bubble Nebula, Sharpless 162 or Caldwell 11) is an H II emission nebula located about 8,000 light years away in the constellation Cassiopeia.
The “bubble” is created by the stellar wind from a young, massive, hot central star of magnitude 8.7, SAO 20575 (BD+60°2522). The nebula is located near a giant molecular cloud that contains the expansion of the bubble nebula, while in turn being excited by the hot central star, which makes it glow. 
NGC 7635 was discovered in November 1787 by William Herschel.
In the post about the planetary nebula NGC 40 a couple of weeks ago, I mentioned that the L-Ultimate filter is difficult to use with a restricted FOV due to plate solving issues. I also mentioned that I had solved the problem by using another Optolon narrowband filter that I had in my drawer waiting to be tried out, which proved to be crucial in my situation. 
The filter in question is the L-Para, a dual band with two 10 nm passbands in the H-alpha and OIII wavelengths, kindly sent to me by Jessica Han to test in combination with the L-QEF. The subject chosen for its first light is the famous Bubble Nebula, which I had never photographed in such detail before.

 

 

 

Konus 200/1000 @950mm, f/4.8
ZWO Asi224mc camera
Sky-Watcher Eq6r Pro Mount
Optolong L-Para filter 1044x60"
Optolong L-Quad Enhance filter 153x60"
APP, PixInsight, PS
Ferrara (Italy)

Hope you like it.