The Gabriela Mistral Nebula is located at the north-west corner of Eta Carinea. Total integration time is 7 hours: 33 x 300sec Ha, 25 x 300sec Oiii, and 27 x 300sec Sii subs. Processing in DSS and Photoshop CC. Camera was the ASI1600MM-C running at -25C. Taken over a number of nights in difficult summer heat conditions. Telescope was the Skywatcher MN190, sitting on a Celestron CGX mount.
Astrobin Details page (with histogram) here:
http://www.astrobin.com/284496/
Full Screen here:
http://www.astrobin.com/full/284496/0/
Mini thumbnail is below.