Nebulae - PeterNagy
NGC7635: Bubble Nebula Bi-Color (Ha-Oiii-Oiii) in Cassiopeia. 0.47"/pixel. 8/24/2012 and 9/7/2012. 

Astrodon Ha 5nm filter: 21 x 15 minutes, 1x1, Excellent seeing condition.
Astrodon Oiii 5nm filter: 31 x 15 minutes, 1x1, Not so good seeing condition.

Celestron 8" EdgeHD at F/10 with A-P Mach1GTO GEM. Atik 460EX mono. Hutech OAG. Lodestar. 

Captured and pre-processed with Nebulosity. Stacked and post processed with PixInsight.
PHD settings: RA Aggressiveness: 60, RA Hysteresis: 10, Max Dec Duration: 75, Min Motion: 0.70, Calibration Steps: 125msec, Auto/Resist Switching, Extreme dithering and Settled at < 0.5, 3 - 4 sec guiding exposure.

Red = Ha, Green = Oiii, Blue = Oiii

NGC7635: Bubble Nebula Bi-Color (Ha-Oiii-Oiii) in Cassiopeia. 0.47"/pixel. 8/24/2012 and 9/7/2012.

Astrodon Ha 5nm filter: 21 x 15 minutes, 1x1, Excellent seeing condition.
Astrodon Oiii 5nm filter: 31 x 15 minutes, 1x1, Not so good seeing condition.

Celestron 8" EdgeHD at F/10 with A-P Mach1GTO GEM. Atik 460EX mono. Hutech OAG. Lodestar.

Captured and pre-processed with Nebulosity. Stacked and post processed with PixInsight.
PHD settings: RA Aggressiveness: 60, RA Hysteresis: 10, Max Dec Duration: 75, Min Motion: 0.70, Calibration Steps: 125msec, Auto/Resist Switching, Extreme dithering and Settled at < 0.5, 3 - 4 sec guiding exposure.

Red = Ha, Green = Oiii, Blue = Oiii