Dark cosmic dust spreads across the Corona Australis constellation, with light from hot blue stars reflecting a blue glow. Top right of the image also contains NGC6723, a globular cluster in Sagittarius.
There’s a lot happening in this image, I have to thank Cory for giving me this target idea to shoot as it was something he wanted to acquire.
It’s the 1st time using the Canon 5D Mark III on a telescope. (All CCDs and modded Cameras were busy at the time). I was curious to see what the superb sensor would do on the fast Orion 8” Astrograph – I imaged 12x 300sec @ ISO800 of this target. Due to the full frame sensor I was concerned about vignetting, but Cory’s method of shooting flats post-imaging worked well, and corrected the uneven illumination extremely effectively, some coma left in the left edge but tolerable.
(Read more about his post on shooting flats: http://astroshake.com/2014/02/howto-dslr-and-ccd-flat-frames-for-astrophotography/)
Canon 5D Mark III
Baader MPCC MkIII
Orion 8”Astrograph F/3,9
1 Hour = 12 x 300 sec
Guiding: PHD2 & Orion SSAG
Post editing: PixInsight / Lighroom & Photoshop
Imaged in the dark skies of Sutherland, the Karoo – South Africa.