Nikon developed a teleconverter for the first generation of its AF film cameras in the mid 1980s after Minolta looked like having the market all to itself. Years later it was discovered that this particular teleconverter inexplicably could be used on the Nikon D2x, a digital camera introduced 20 years later. For a short time I attempted to use these instruments in combination with an old 300mm lens. Had I used a tripod I might have enjoyed greater success.