Color balancing is a tricky issue the the MX7C, especially if you do not use a IR blocking filter.  The chip is very IR sensitive which leads to the color image being off balance.  Since I don't yet use a IR blocker, I have developed a few techiques using Photoshop which almost correct for this imbalance.  It produces much more pleasing images and no more green stars.

      In Photoshop, once you have your color image loaded, try using these settings.  They may or may not work for you depending on how you created your color image.  I usually use AIP4WIN to create the color image because it corrects for extinction due to the altitude of the object.  I also usually don't mess with the color balance or saturation in AIP4WIN.

    Open the adjust hue/saturation menu in Photoshop, try the following values,  magenta +50, green -82, yellow -24.  At this point you may want to increase the saturation on the master frame to suite your taste.  Next bring up the color balance menu and try these settings, midrange -5 (red), -2 (green), shadows -5 (red), highlights -5 (red).  You should now have a more pleasing image which isn't necessarily true color but it should be alot closer than the original.

NEW!
In August of 2002, I started using a Hutech IDAS light pollution reduction filter to aquire my images.  The filter is absolutely outstanding at reducing the glow from light pollution and it incorporates IR blocking, a  must for producing accurate color with the MX7C.  It has worked wonders for me in being able to produce very accurate color images.  There is a slight reduction in chip sensitivity although this is easily taken care of by increasing exposure time.  I originally bought the filter to use with my Stellarvue Achromat refractor but have found that it works great with my LX200 reflector also.

The other technique which has produced the best results for me is to use Jorg Weingrills CMY plugin for Astroart.  The plugin allows one to pull the raw CMY frames from the image in a similar way that the normal Astroart color plugin works.  The MX7C chip actually contains Cyan, Magenta, Green and Yellow filters and this plugin allow you to extract the raw data .  It produces much better color images when using the trichromy function of Astroart than the normal color plugin.  After I extract the raw frames I stack them in Astroart and color combine using AIP4WIN.  I've found the following RGB balancing values to work very well in AIP's "process CMY" routine: R=1.0, G=.897, B=.659.  This is in conjuction to using the IDAS filter when aquiring the image.