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[SII] = Red, Hydrogen Alpha = Green, [OIII] = Blue
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Hydrogen Alpha = Red, [OIII] = Green, [SII] = Blue
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[SII] = Red, [NII] = Green, [OIII] = Blue
Taken November 26, 2003 and December 15 and 21, 2003 from my backyard in Castro Valley, Ca.
C14 imaging scope @4430mm focal length (f/12.46) with Camera Rotator and stabilized with mirror locks
FLI IMG1024S imaging camera @ -40C
SBIG AO7 Adaptive Optics System
SBIG ST7E Guide/AO control camera @-20C
RCOS Dichroic Beam Splitter for AO7/IMG compatibility
FLI CFW 1 filter wheel
Custom Scientific Narrowband Emission Line Filter
[Sulfur II] 672.4nm 3nm FWHM
Hydrogen alpha 656.3nm 3nm FWHM
[Nitrogen II] 658.3nm 3nm FWHM
[Oxygen III] 500.7nm 3nm FWHM
First two images:
1 exposures of 20 minutes for [SII], [OIII]
2 exposures of 20 minutes for Halpha
Last Image:
3 exposures of 45 minutes for [SII], [NII] and [OIII]
Maxim DL used for IMG1024S control
CCDSOFT 5.00.71 used for AO7/ST7E control
Sigma prebeta 11 used for darks, flats, biases and light combine
Photoshop CS used for final touch up