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Another shot from OSP. I used H-alpha for red, but included G and B channels. There is some L exposure also, but luminance comes mostly from H-alpha. I'm still experimenting with ways to combine narrow- and broadband images.

AT111EDT at f/5.6
QSI 583
AP Mach1

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Comment by Philip A Cruden on August 26, 2012 at 3:07pm

very cool man

Comment by Greg Marshall on August 25, 2012 at 1:27pm

Thanks! The exposures are:
H-alpha: 5 x 15min
L: 10 x 4min
B/G: 8 x 4min each
So about 3 hours total. However, the luminance channel is a fairly small part of the final image, unlike a typical LRGB image.

Comment by Jeffrey P Nunnari on August 25, 2012 at 9:42am

Great shot - how much time did you put on it?

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