The Rodenstock Rodagon 35mm F4.0 Lens can be used with SLR cameras by both amateurs and professionals. This macro lens can be used along with the Rodenstock focusing device Modular-focus in CCD cameras.The lens construction includes six elements that offer high resolution with fine detailsThe recommended working aperture can be obtained by stopping down 2 stops from open apertureRodenstock Rodagon camera lenses have a click-stop diaphragm, pre-set aperture, and an illuminated f-stop displayThe click-stop diaphragm can be changed to stepless control up to 135 mm focal lengthThe maximum film format of this 35mm enlarging lens is 24×24 mmThe flange focal length of the Rodenstock Rodagon 35mm F4.0 Lens is 31.2mmThe dimensions of the lens are 37.2 X 50.0 mm (length X diameter)