Nebulae in H-alpha, part 1

[umasscrew39]

Had a decent night with above average transparency & seeing but 98% moon illumination. So, time for the Astrodon H-alpha filter with a ZWO ASI 1600MM Pro cooled at -10; gain 300. Taken with a C11" EdgeHD @f/7 and stacked 300s x 4 (20 min total exposures) using PHD2 guiding.

[turfpit]

Nice images Bruce. Ha filter is a good way to use the big moon period. Tracking looks good, the C11 must be a severe test of everything being correctly set. If you capture some OIII you should have the makings of some interesting HOO images.

Dave

[umasscrew39]

Thanks much, Dave. Yes- getting the C11 to play nice along with PHD, OAG, the dew issue we already discussed, etc. has made it a challenge (sometimes fun, sometimes not so fun)- especially being 12ft off of the ground. After about 12 months, I have just about everything automated so rarely need to go up top except to change a lens, filters or camera. Good thing of an observatory is polar alignment and collimation are rarely needed as the scope is solidly in place. I tried OIII last night on the Bubble N but clouds rolled in. Will try again and see if I can get a nice palette out of it.