This lens has cleared the strict optical standard of Leica and achieved a large diameter of the open F -number 2.8 "Elmarit".The optimal arrangement of two UED lenses will enhance various aberrations such as chromatic aberration and distortion, which tends to occur as the focal length becomes longer.In addition, ghosts and flare are reduced by adopting nanoser festival coating.- Weight 1245g * Not included lens hood, lens cap, lens rear cap, tripod seat dustproof/drip -proof function Yes * When mounted on a Panasonic dust -proof and drip -proof camera body mount Micro Four Thirds Single focus lens Telephoto Focal length (single focus) 200mm Open F -number 2.8F value Lens body 15 groups (UED lens → 2 sheets) Bundled 1.4X teleconverter 6 4 groups Aperture 9 -piece blading -shaped rainbow color Filter diameter φ77mm Maximum shooting magnification 0.2 times (35mm format → 0.4 times) Maximum shooting magnification (when using telecon) 0.28 times (35mm format 0.56 times)