NGC7635 Bubble Nebula in Ha light from 18" Cassegrain

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Shot in my backyard in Castro Valley, Ca on October 31, 2004

Compact Collapsible Cassegrain 18" @f/12.60 (F=5760mm)

IMG6303E camera @-35C

AO7 @ 6Hz

RCOS Dichroic beam splitter

ST7E guide camera

FLI CFW1 Filter wheel

Schuler 9nm Halpha filter

5 exposures of 20 minutes through Schuler Ha filter (binned 2x2)

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