[6209]107FL + BU-1 Set Part # 6209 Description 107FL + BU-1 Set Aperture 107mm Fluorite Focal length 600mm F-ratio 5.6 Lens configuration 2 elements in 2 groups Coating Fully multi-coated Physical length 450mm Tube diameter 80mm Weight 3.4kg Filter 82mm (front cap) Parts included 2107, 9000, 7603, 7000, 3200 & 3125 Notes