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[SII] = Red, Ha = Green, [OIII] = Blue
Taken on September 6, 2009 from my ranch in the California Gold Country under a full moon
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Halpha = Red, [OIII] = Green, Helium II = Blue
Helium II (468nm) only
Taken on September 6 and 12, 2009 from my ranch in the California Gold Country
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 filter
10 x 3 minutes per filter ( [SII], Ha, [OIII])
37 x 3 minutes Helium II
2 hours 51 minutes total exposure