8 hours total exposure
8 hours total exposure
click image to enlarge, click here for highest resolution
Taken on September 1 and 4, 2006 from my backyard in Castro Valley, California
Stinger
450 Classical Cassegrain (18" f/12.6)
To
see as a tricolor [SII], Halpha and [OIII] image click here: 
Lumicon Giant Easy Guider with Focal reducer for final: F= 3366mm, f/7.1
Finger Lakes CM10 MaxCam imaging camera operated at -20C
Robofocus
Finger Lakes CFW1 Filter wheel
SBIG ST7E guide camera
Custom Scientific 3nm FWHM Ha filter (50mm diameter)
Sixteen exposures of 30 minutes in Halpha
Eight hours total exposure time