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[SII], Ha, [OIII]: RGB
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Ha, [SII], [SII]: RGB
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Ha only
Taken on October 11, 2003 from my backyard in Castro Valley, Ca.
Astro-Physics Traveler f/6 with Astro-Physics 0.75X Telecompressor (F=457.5mm total, f/4.5)
Finger Lakes Instrumentation IMG1024S "Dream Machine" Imaging Camera at -40deg C.
Astro-Physics 80mm guidescope
SBIG ST7E guide camera
Astro-Physics AP1200GTO mount
Finger Lakes Instrumentation DF2 Digital Focuser
Finger Lakes Instrumentation CFW1 Filter Wheel
Custom Scientific Narrowband Emission Line Filters
[Sulfur II] 672.4nm 3nm FWHM
Hydrogen alpha 656.3nm 3nm FWHM
[Oxygen III] 500.7nm 3nm FWHM
3 exposures of five minutes each through each filter
45 minutes total exposure time
Maxim 3.20 used for image capture
Sigma pre-beta 11 used for darks, biases, flats, combines
Photoshop 7 used for final adjustments
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