glend
08-11-2016, 11:26 AM
This is my first attempt at Thor's Helmet (NGC 2359) in Canis Major, about 12,000 LYs away. Thor's Helmet is surprisingly rich is Oiii, not so much Ha as I expected, and very little Sii - for the time invested with my little scope.
The image here consists of: 36 x 300sec Ha subs. 30 x 300sec Oiii subs. So total integration time of 5.5 hours . Camera was the ASI1600MM-C running at -25C, Baader Ha and Oiii NB filters, and the scope was the TS Photoline APO 115mm, F7 (reduced to f5.5 for this sequence). Processed in DSS with Darks and Bias Frames, and layer colour processing and stretching was done in Photoshop CC 2017. This is an HOS pallet image, and yes it is green again due to the Oiii data overpowering the Ha. I need to run probably twice as much Ha to get any more impact. Note that the histrogram looks particularly small, and give the time invested I am sure one of my larger scopes would have been a better light bucket.
Astrobin full screen image here:
http://www.astrobin.com/full/271388/0/
Detail page here:
http://www.astrobin.com/271388/
The image here consists of: 36 x 300sec Ha subs. 30 x 300sec Oiii subs. So total integration time of 5.5 hours . Camera was the ASI1600MM-C running at -25C, Baader Ha and Oiii NB filters, and the scope was the TS Photoline APO 115mm, F7 (reduced to f5.5 for this sequence). Processed in DSS with Darks and Bias Frames, and layer colour processing and stretching was done in Photoshop CC 2017. This is an HOS pallet image, and yes it is green again due to the Oiii data overpowering the Ha. I need to run probably twice as much Ha to get any more impact. Note that the histrogram looks particularly small, and give the time invested I am sure one of my larger scopes would have been a better light bucket.
Astrobin full screen image here:
http://www.astrobin.com/full/271388/0/
Detail page here:
http://www.astrobin.com/271388/