Performance of the CPR-1200 lenses.The lenses known as "conversion" lenses because they change the focal length of the camera lens to which they are attached. The telephoto lense magnifies the image 1.5 times, making objects appear larger, or closer, than they would have appeared using the camera alone.Thge wide angle lens broadens the angle of view by about 50% making the objects appear smaller& including more are than would be possible with the unaided camera lens.All lenses are made of hi-index ortical glasses. (fully coated).