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Cropped image of the Bubble/M55, 14hr total exposure through 35nm H-alpha Baader filter. NS11/Hyperstar3, QHY10.

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Comment by Ian G on November 17, 2011 at 7:14am

I'm still not as "deep" as I want to be. There's some gas, that I'm missing LOL! Probably with narrower HA filter I' would've captured more contrast there, but it's one of the Hyperstar's limitations - you can't go too narrow (like 8nm). Too short-focused at F/2.

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