Sh2-105 also know as the Crescent Nebula is an emission region located about 5000 ly away in the constellation of Cygnus.
Image capture details:
Subs: 84 * 600s dithered/unguided
Camera: ASI2600MC Pro Colour camera
Filter: Optolong L-Extreme Baader L-Booster
Scope: Skywatcher Esprit 150 with dedicated flattener (f/7)
Mount: 10micron GM2000 UltraPort
SQM: Bortle 6
Calibration: bias, darks and sky flats
Processing: Pixinsight processed as RGB
Location: Garden ROR observatory SE London
Fully automated capture over four nights through August and September 2020 courtesy of Voyager Automation software.
Hope you like it.
(https://live.staticflickr.com/65535/50334415623_f4e6bcc0a9_b.jpg)
2k size: https://live.staticflickr.com/65535/50334415623_e7babb9b40_k.jpg (https://live.staticflickr.com/65535/50334415623_e7babb9b40_k.jpg)
3k size: https://live.staticflickr.com/65535/50334415623_f988d8577f_3k.jpg (https://live.staticflickr.com/65535/50334415623_f988d8577f_3k.jpg)
Flickr croaked at the full size and bit depth.
Robert
Yes I like it lots
Excellent result Robert! You have that OSC camera fully dialed-in.
Roberto
Ooops - bit of a filter mixup ! The Optolongs don't seems to produce haloes but there were some... I had thought this may have been due to moisture but after investigation I've found that the filter wheel ID was set incorrectly; it was stuck on the Baader L-Booster. Unfortunately I have a few others taken with the same filter :(
Not quite as bad as leaving a focusing mask on but round deep fried dough mixes do spring to mind.
Robert
Lovely result Robert!
I was wondering how you got such good colour from your skies then I saw the filter being used.
The stars are beautifully sharp right into the corners. Your Esprit and 10micron mount are doing a good job!
Mark
Thanks all.
Wonderful stars and depth of detail Robert
your mount is doing an excellent job.
(not suggesting you didn't!)
Noel