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I've added O3 and S2 data (as green and blue, respectively) plus additional H-a.
AP Starfire 142 at f/7 (no reducer or flattener)
AP Mach1 mount
QSI 583
3.5 hours of H-a and 2 hours each of O3 and S2

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Comment by Marc Basti on July 10, 2012 at 5:34pm

Greg, couple of cool pics, good job. Particularly like this one, the color and the fact you don't see this one all the time. Marc

Comment by Greg Marshall on July 10, 2012 at 8:21am

Thanks! The nights are pretty short here (I'm at about 46 degrees north), but with narrowband imaging it doesn't need to be very dark. This shot was made under a nearly-full moon also. One day as I was waiting for it to get dark I tried an H-alpha exposure of M16. It wasn't a great image, but the "Pillars of Creation" were clearly visible, while with the naked eye I could see only a few of the brightest stars in the sky!

Comment by Clas Gripenberg on July 10, 2012 at 12:34am

Very nice pictures Greg. I envy your nights being dark enough to imagine quality pictures. Up here in the north it’s still to light.

Comment by Greg Marshall on July 9, 2012 at 10:22pm

Speak up, Trevor!

Comment by Trevor Jones on July 9, 2012 at 5:08pm

Comment by Trevor Jones on July 9, 2012 at 4:57pm

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