I have a polar scope adapter for the HEQ5-EQ6. This was purchased new last week to experiment with. It comes with a 6 mm "C" mount lens. It works with just about any web cam. See the thread on polar scopes. I no longer need it because I custom made my own version. It cost me $125 + postage. I would like $60 (negotiable). It has an extra hole in the bar to allow a greater range of web cams.