A number of years ago, I purchased a Bausch & Lomb spotting scope that was an eight hundred millimeter lens with a right-angle adapter that came with two eyepieces to make an approximately twenty-six and forty-four power spotting scope. Does anyone remember these or better yet know the thread size of the lens? I am looking for the extension tube/adapter to convert it to use as a telephoto lens. I understand that these were supposed to come with it but mine didn't have it in the box. There weren't any lens caps to protect the lens either! 
