This digital camera adapter is specifically made for use with digital cameras using filter threads. Fits to the Kowa DA 4 camera adapter. Use this adapter with any of the TSN 600 or TSN 660 spotting scopes as well as 820 & older scopes. The Kowa digital camera adapter is secured in place with a single screw, allowing for quick and easy switching between viewing and photographing. The TSN-DA4 or an Adapter Ring is necessary to connect with a digital camera. Kowa Digital Camera Adapter for TSN-82SV/660/600 Series TSN-DA1