The Meade #64ST Adapter for Photography w/ ETX-60, ETX-70 & ETX-80 Models allows for prime focus photography with Meade ETX-60, ETX-70 and ETX-80 models. The #64ST Adapter threads to the rear photo port of the ETX telescope. Output is a standard photographic T-thread to which many imaging devices including the Meade DSI will thread directly. For film based SLR cameras a T-Mount (not included) is required, ordered separately for your specific 35mm camera brand and model. The combined Meade #64ST Adapter for ETX-60, ETX-70 and ETX-80 Only and T-Mount rigidly couple the telescope's optical system, which in effect becomes the camera's lens. Meade #64ST Adapter for Photography w/ ETX-60, ETX-70 & ETX-80 is compatible with all ETX-60, ETX-70 and ETX-80 models.