At one-third the size and weight of typical 600mm Dslr lenses, the M.Zuiko 300mm f4.0 Is Pro (600mm equivalent) is nimble enough for hand-held shooting and compact enough to carry on even the most arduous expeditions. Industry-first 5-Axis Sync Is technology employs in-body and in-lens stabilization to harmoniously deliver six shutter speed steps of compensation and incredibly crisp, detailed photographs. 300mm Focal Length Splashproof, Dustproof, Freezeproof Construction Manual Focus Clutch Z Coating Nano to reduce ghosts and flares Super Eda Glass F4.0 Maximum Aperture Maximum Image Magnification .24x Minimum focus distance 4.5 feet 1.4x Teleconverter Compatible Retractable Lens Hood Msc Movie and Still Compatible Dedicated Fn button Synchronized Image Stabilization The in-lens stabilization on the M.Zuiko 300mm f4.