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Just got a week of clear weather will I had access to my telescope, managed to get a good amount of data, treatment will have to wait though (I have some exams in 2 weeks). In the meantime, here's a quick test I did with the horse head nebula.
This is a SHH composition (there is nearly no OIII emission in this nebula and I did bother imaging in this wavelength).
The Horsehead Nebula, Barnard 33 // ROMAIN SOSSO
The Sword of Orion // HansTrapp
At the bottom left is the familiar Orion Nebula (M42), shinning brilliantly. Towards the top right is the dark Horsehead Nebula (Barnard 33) and brighter Flame Nebula (NGC 2024).
The Horsehead Nebula, Barnard 33 // M.zamani
The Horsehead Nebula (Barnard 33, center) and NGC 2023 (lower left) // Sky Story
The Horsehead Neebula (Barnard 33, center) and the Flame Nebula (NGC 2024, left) // randcpoll
Ok, so I was searching for information on some of the objects visible in my photo of the horse head nebula and I found these two posts (Reddit and Astrobin) by DanielZoliro that also used a SII and Ha combination but with a slightly different processing (Notably, the RGB combination being R: SII, G: 0.6xHa + 0.4xSII, B: Ha). I loved his results and I had to try it with my own data. Did turn out great, but there was a reflection of a star on the SII data and this processing amplified it (the big reddish round/donut thing on right of the full image).
(Image taken using a CarbonStar 150/600 newtonian telescope with a 0.95 coma corrector, ZWO ASI294 monochrome camera and Baader 6.5nm SHO filter. 5x120s image for each colour filter (RGB), 22x300s for the Ha filter and 32x300s for the SII filter, total imaging time 5h, stacking and processing done in PixInsight.)
The Horsehead Nebula | Martin Heigan on Flickr
The darkness of the Horsehead is caused mostly by thick dust blocking the light of stars behind it. This stellar nursery contains organic and inorganic gas and dust, including complex organic molecules.
