This is a two-panel mosaic taken with my ED127 plus a 0.7 reducer - the Soul Nebula only just fits in the frame. I also used drizzle on these files since with the reducer I am under-sampling a little so drizzle wins me back some of the resolution. Astrobin reports an image scale of 0.7 but actually it is 1.4 arcseconds per pixel before drizzle takes effect.
I've been spoiled by the dark skies in Colorado - this was the first image I've taken from Keller (Bortle 7) since we returned and was inspired by two images recently posted, one by Itto Ogami (aka Jim) (
https://www.astrobin.com/full/e1hdwc/0/) and the other by James Potts (also Jim) (
https://astrob.in/kedvfo/0/) - both excellent images.
So, I expected better from 18 hours of imaging.......the ZWO DUO (same specs as the Optolong L-eNhance) filter has a 15nm band for Ha and the catch-all 35nm band for OIII and Hb. The raw integrated mage had an absolutely awful red-green gradient which took five iterations of DBE to remove. Maybe some of the gradient came from the moon which was in the sky for some of my images....not sure.
Anyway, here is the best I could achieve, after much back and forth trying different ideas to make it even close to the images referenced above!
Comments