Taking advantage of a momentary clearing of the smoke plume covering most of the US, I was able to get a couple of nights of photon capture for NGC7635 - The Bubble Nebula. Most of my experience over the past year of astrophotography is with OSC RGB and this is only my second narrowband image - so I am still on a big learning curve here....
This image is the result of 25x5min exposures through Ha, O3 and S2 narrowband filters - for a total integration of about 6.25 hours. This was taken over two nights in the past week when a cold Canadian airmass pushed the smoke plume from the fires out west down south of us. I would like to get more integration but I only have access to it for a few hours as it rises above my tree line and before it sets behind another set of trees. (I keep telling my wife that the next astro purchase will a chainsaw - she is not amused).
A full res version of this image can be see here: https://astrob.in/v8f2cw/0/
Thanks for looking!
Here are the details for this image:
25 x 500 seconds, bin 1x1 @ -15C, unity gain, ZWO Gen II Ha Filter
25 x 500 seconds, bin 1x1 @ -15C, unity gain, ZWO Gen II O3 Filter
25 x 500 seconds, bin 1x1 @ -15C,u nity gain, ZWO Gen II S2 Filter
50 Bias exposures
25x500 seconds Dark exposures
50 Ha Flats
50 O3 Flats
50 S2 Flats
Scope: Astrophysics 130mm Starfire F/8.35 APO refractor
Guide Scope: Televue 76mm Doublet
Camera: ZWO ASI1600mm-pro with ZWO Filter wheel with ZWO filter set
Guide Camera: ZWO ASI290Mini
Focus Motor: Pegasus Astro Focus Cube 2
Camera Rotator: Pegasus Astro Falcon
Mount: Ioptron CEM60
Polar Alignment: Polemaster camera
Capture Software: PHD2 Guider, Sequence Generator Pro controller
Image Processing: Pixinsight, Photoshop, along with Coffee, extensive processing indecision and second guessing, frequent processor's regret, significant frustration and the occasional swear word...…..