Swarovski TLS APO 43mm SLR Camera Adapter for ATX / STXThe Swarovski TLS APO 43 for ATX STX Spotting Scopes is an adapter used to connect a full frame DSLR camera to the eyepiece module of your spotting scope. The 43mm version more closely matches the circle of illumination to the size of the camera's sensor to eliminate vignetting found with the original TLS APO. This concept makes Digiscoping a breeze so you can take professional grade photos of subjects at great distances with your choice of camera. To