This Digi-T System (Scopetronix item #STDT4) works with digital cameras with lenses threaded for 37mm accessories. The Digi-T ring uses 3 set screws to mount to most 1.25" eyepieces and the step ring connects the Digi-T ring to your camera. I used this one with a Sony Mavica digital camera and it worked great. List price $59.95. My price $45 shipped CONUS.