[SII] = Red, Ha = Green, [OIII] = Blue
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to see IC443 in Halpha at higher resolution, click
here: 
Ha = Red, [OIII] = Green, [SII] = Blue
Click image to enlarge, click here for maximum resolution
Taken on January 18, 2005 from my backyard in Castro Valley, Ca
Pentax Takumar 150mm f/2.8 medium format camera lens (stopped down to f/4)
ST10XME imaging camera (self guided) operated at -30C
Finger Lakes DF2 Digital Focuser
Finger Lakes CFW1 Filter wheel
AstroDon 6nm Ha, [SII] and [OIII] narrowband filters (50mm unmounted)
Six exposures of 10 minutes through each filter
Three hours total exposure time