Thanks for the replys.
According to the manual I have the ST-7 and ST-8 "include an exciting new feature - self guiding (patent applied for). These cameras have two CCDs inside..")
I'd have to check on the existence of the actual filters - the camera
has been idle for over a year I believe, and anything could have happened to the filters in a school environment.
Thanks again for he indicative price range! I was thinking $500
Andrew