(first light for AstroDon filters)
Red = [SII], Green = Halpha, Blue = [OIII]
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Halpha only
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Taken on December 9, 2004 from my backyard in Castro Valley, Ca
Takahashi FSQ106 f/5 (F=530mm) imaging scope
FLI IMG6303E imaging camera at -42C
AP80/900MM guide scope
SBIG ST7E guide camera at -20C
Finger Lakes CFW1 filter wheel
AP1200GTO mount
Finger Lakes DF2 Focuser
AstroDon 50mm Narrowband Emission Line filters (AR Coated)
Hydrogen alpha
[Sulfur II]
[Oxygen III]
6 exposures of 10 minutes through each filter
3 hours total exposure time