NGC7635 Bubble Nebula (Hydrogen alpha filtered)

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Taken on July 24, 2003 from my backyard in Castro Valley, Ca.

AP155EDF imaging scope @ f/7 (F=1085mm)

SBIG ST10XME imaging camera @ -18C

AP80mm guide scope (F=900mm)

SBIG ST7E guide camera @-15C

FLI CFW1 Filter wheel

Custom Scientific Ha filter (3nm FWHM)

AP900GTO mount

Three exposures of 30 minutes

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