Supernova remnant RCW 103, a SINGLE 1 hour exposure!
Howdy
Just as a test I always wanted to try this. A single 1 hour exposure with a DSLR.
I used the Baader 7 Nm Hydrogen Alpha filter to stop any chance of over exposing the sky background as the moon is full.
1 hour ISO 400, modded 350D, 10 inch f5.6 newtonian, I took a single 1 hour dark after that, didnt bother with flats or offsets. On the full size image theres some field rotation as the mount needs polar alingment as the ground has dried out and moved a bit. However I did the exercise to see how much noise would be present. Iris did a good job removing the dark current noise, especially as it was a warmish night.
Scott
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