T-adapter for the 8" Edge-HD Schmidt-Cassegrain. With this T-adapter, you can attach your 35 mm DSLR to the primary focus of your Edge HD telescope. This allows you to use it for terrestrial photography and lunar and planetary photography with short exposure times. Deep-sky photography is also possible with a tracking control (guide scope). You need both this T-adapter and a T-ring to attach your camera to the telescope.