Kowa TSN-DA20 AdapterThe Kowa TSN DA20 Adapter makes your DSLR compatible with your TSN 550 Spotting scope in a few easy steps! Remove your scope's eye cup and replace it with the inner collar of the adapter ring. Connect the outer collar of the adapter to a T2 ring attached to your camera body via the TSN AR42GT filter ring, which protects your camera sensor from dust and debris while using the adapter. Once you attach the outer collar of the TSN DA20 to the inner collar