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Halpha only (click to enlarge)
Taken on June 6, 2004 from my backyard in Castro Valley, Ca.
AP180EDT f/9 imaging scope used at F=1620 (f/9)
AP80/900mm guide scope
AP1200GTO mount
SBIG ST10XME imaging camera @-26C
FLI CFW1 Filter wheel
FLI DF2 Digital Focuser
ST7E guide camera @ -15C
Custom Scientific [SII] filter 673.4nm/ 3nm FWHM
Custom Scientific [OIII] filter 500.7nm/3nm FWHM
Custom Scientific Ha filter 656.3nm/3nm FWHM
Four exposures of 600 seconds for Ha, [SII] and [OIII] (all binned 2x2)
Total exposure time 2 hours
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