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Crescent nebula
 
© D Elijah
Credit Please credit D Elijah if you are using this image.

Crescent nebula

The Crescent nebula. Processed using DSS. 

Hardware details: Camera: Canon 600D. Telescope: SW Evostar 120 with Baader UHC-S filter. Mount: AZ-EQ6 guided using a ST80 synguider. Image details: Lights: 2 x 3min at ISO 800, Darks: 20 x 3min 20sec at ISO 800 (from dark library), Lights and darks separated by 30 sec intervals. Flats: 40 x 1/40s at ISO 800, Bias: 30 x 1/8000 at ISO 100

Date of capture 05/06/2016. Atmospheric transparency was good (I only had a few minutes before morning twilight). Auto guiding was stable.

I increased the saturation by 25% and manually aligned the colour channel histograms. I stretched the red colour histogram more than the green or blue to increase its contrast. The 600D is astro modded so does pick up H alpha in the red so the result is far better than the old D200. I need more lights. Also the 600D had much less dark noise that the Nikon, more of the field is usable now. No drizzling was done on this stack.


Credit

Please credit D Elijah if you are using this image.

Copyright

© D Elijah
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