M1 Crab Nebula in Ha, [OIII] and [SII] light

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Ha = Red, [OIII] = Green, [SII] = Blue\

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[SII] = Red, Ha = Green, [OIII] = Blue

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Hydrogen alpha only (45minutes x 1)


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[Oxygen III]  only (45minutes x 1)


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[Sulfur II]  only (45minutes x 1)


Taken December 16, 2003 from my backyard in Castro Valley, Ca.

C14 imaging scope @4430mm focal length (f/12.46) stabilized with mirror locks and with camera angle adjuster

FLI IMG1024S imaging camera @ -40C

SBIG AO7 Adaptive Optics System

SBIG ST7E Guide/AO control camera @-30C

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

   [Oxygen III]                 500.7nm  3nm FWHM

1 exposure of 45 minutes for [SII], [OIII] and Ha filters

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

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