Kowa TSN-PA6 600mm Focal Length SLR and Digital SLR Camera Photo Adapter

600mm focal lengthF/6.8 or 7.8Can be used with TSN-880 or TSN-770 Series spotting scopesFor film or digital SLR camerasRequires a camera mount to attach to the camera body
Product DescriptionThis photo attachment has a fixed focal length of 600mm and can be used for both film and digital SLR cameras. This adapter replaces the eyepeice of the spotting scope and the lens of the camera effectively making the spotting scope the camera lens.

Source: Digital Camera and Video Store...