M27 in Halpha, [OIII] and Helium II from AP180EDT f/9 and FLI ML4022 with Custom Scientific Filters

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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 

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