This valuable adapter converts video cameras, (or 16mm film cameras) with removable lenses from the standard "C-mount" thread, to the larger T-thread used in still cameras. Thus, any of these cameras can be converted for use with a telescope.
To adapt a C-mount camera for use with a Celestron instrument, first thread the T-C Adapter onto the camera, next thread a T-Adapter onto the T-C Adapter, and last, thread this assembly onto the rear cell of your Celestron instrument.
Please note that some film and video cameras use standard still camera lenses, and therefore use a normal T-Adapter and T-Ring. Check your camera's instruction manual for more detailed information.