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Taken on August 27, 2007 from my backyard in Castro Valley, California
Stinger
450 Classical Cassegrain (18" f/12.6) 
Lumicon Giant Easy Guider with Focal reducer for final: F= 3366mm, f/7.1
Finger Lakes IMG1024S Dream Machine imaging camera operated at -30C
Robofocus
Finger Lakes CFW1 Filter wheel
SBIG ST7E guide camera
Custom Scientific 4.5nm FWHM Ha filter (50mm diameter)
seven exposures of 20 minutes through Halpha filter
two hours 20 minutes total exposure time