Perhaps an unconventional look for the bubble.
The reddish tones are due to the hydrogen, while the white/blue wispy stuff is sulphur.
NGC 7635, also called the Bubble Nebula, Sharpless 162, or Caldwell 11, is a H II region emission nebula in the constellation Cassiopeia. The "bubble" is created by the stellar wind from a massive hot, 8.7 magnitude young central star.
The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow
[description lifted from wikipedia.org]
Ha acquired on Oct 13 and 14, 2013 from my backyard
SII acquired on Oct 30 and 31.
Ha: 28 x 30m
SII : 28 x 30m
Total exposure time: 28 hours
Main Camera: QSI 583 WSG
Guide Camera: SXV Lodestar (on OAG)
Mount: Astro-Physics Mach 1
Scope: Celestron EdgeHD 8" (FL: 2032 mm)
SXV Adaptive Optics
Image Aquisition software MaximDL
Registed, Calibrated and Stacked in MaximDL
Post Processed with PixInsight 1.8 and Photoshop CS6