Olympus 300mm f/2.8 Super Telephoto ED Lens for Olympus Digital SLR Cameras Caps - Hood - Case - Strap - DPF-43 Drop in Circular Polarizer - DPF-43 Drop-in Filter Holder - SCF-43 Filter - ND4-43 Filter - ND8-43 Filter - FSC-1 Filter Case Construction: 13 elements in 11 groups, including 3 ED elements and 1 filter holder 300mm Telephoto (600mm 35mm equivalent) Focusing Mechanism Inner focus with floating mechanism Number of Blades 9 Angle of view: 4.2 F stop range: Maximum Aperture: f2.8 - Minimum Aperture: f22 Closest Focusing Distance: 6.6 ft. (2m)