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2 hours 15 minutes of Helium II binned 2x2
Taken on September 6, 2009 from my ranch in the California Gold Country under a full moon
why the scopes are behind a corral
AP180EDT f/9
FLI Microline ML4022 imaging camera operated at -25C
AP 1200 GTO mount
AP80/900mm guide scope with adjustable rings
SBIG ST7E guide camera
Custom Scientific 3nm FWHM AR-coated 50mm round Halpha, [OIII] and Helium II filter (4.5nm)
23 x 15 minutes binned 2x2
5hours 45 minutes total exposure