IC1318 in Cygnus
With a clear sky & Cygnus high in the evening sky I focussed my attention on IC1318. For some time now I have been using the Astronomik h-alpha filter, mainly due to the fact that the moon is almost always present when I have clear skies.
One of the main issues I have using the CLS filter is harsh gradients & high green channel. Gradients can be removed to some extent by miens of flats and post processing techniques.
IC1318 22/08/2011 (20x4min)
Canon EOS 40D (H)
Leitz 180/f3.4 at f4
ISO1600
Astronomik CLS
Mount – Astrotrac TT320x
Stacked in DSS Processed in PS3
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