The CFW10 allows you to carry a large array of filters in one filter wheel without having to change carousels.  LRGB+Clear filters for color imaging can be installed along with several narrow band filters such as H-alpha, O[III] and S[II], or a complete color plus photometric set. The CFW10 adds only 0.56" of backfocus to SBIG cameras and can be used with camera lens adapters. A stand-alone model, controlled via a computer's serial port, is available for other cameras.

CFW-10 10 Position Filter Wheel for ST Series Cameras Product Information Sheet