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The Wall is part of the North American Nebula. Although it is mostly hydrogen, there is enough sulfur and oxygen to make an interesting color image with appropriate processing.

6 x 30 minutes each, 3nm H-a, OIII, and SII filters (9 hours total)
AP 142 at f/7.5 (native)
QSI 583wsg, Astrodon 3nm filters
AP Mach1 mount

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Comment by Greg Marshall on August 4, 2014 at 2:07pm

Thanks, Bob.

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