65 x 20 minutes: red = Halpha, green = [OIII], blue = [SII]
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22 x 20 minutes
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15 x 20 minutes
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Red = Halpha, Green = [OIII], Blue = [SII]
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"Pseudo-True Color" aka "synthetic Hbeta" palette:
Red = Halpha + 30% [SII] Green = [OIII], Blue = [OIII] + Hbeta
Hbeta = 30% * Halpha
Taken on July 5, 8, 9, 20, 21, 27, 30, 31, August 1 and 3, 2007 from my backyard in Castro Valley, Ca.
Pentax SMC 300mm f/4 medium format camera lens
Finger Lakes IMG6303E imaging camera operated at -26C
Finger Lakes DF2 Digital Focuser
Finger Lakes CFW7 Filter wheel
Takahashi FCT-76 guide scope
SBIG ST7E guide camera
Custom made camera mounting frame
Baader Planetarium 7nm Ha filter (50.8mm unmounted)
Baader Planetarium 8nm [SII] filter (50.8mm unmounted)
Baader Planetarium 8nm [OIII] filter (50.8mm unmounted)
5 exposures of 20 minutes for Halpha
5 exposures of 20 minutes for Sulfur
3 exposures of 20 minutes for Oxygen
5 hours total exposure time