The Swarovski TLS APO 30mm Digiscoping Lens for ATX / STX spotting scopes is a proprietary adapter used to connect a DSLR or mirrorless camera body with APS-size sensors to the viewing module of ATX / STX series spotting scopes. When the TLS APO, T2 adapter, and camera body are mounted to the spotting scope eyepiece, users are treated to a truly stunning digiscoping experience. The TLS APO has a 30mm lens that perfectly aligns the camera sensor with the focal plane of the transmitted image. Regardless of the camera used, you will capture contrast-rich and sharp video and still images using the premium optics of your Swarovski spotting scope. A camera and T2 camera adapter are required to complete the Swarovski digiscoping system, and are not included.