PANASONIC LUMIX G Leica DG Vario-Elmar Professional Lens, 100-400MM, F4.0-6.3 ASPH, MIRRORLESS Micro Four Thirds, Power Optical I.S, H-RS100400 (USA Black) Experience a Mirrorless Micro Four Thirds camera lens design with a significant reduction in size and weight. Up to two-thirds smaller and one-fifth the weight of comparable DSLR 35mm long zoom lenses 100-400mm F/4.0-6.3 LEICA VARIO-ELMAR high-performance lens for nature photography (200-800mm 35mm camera lens equivalent), Closest Focusing Distance : FULL:1.3m/4.27ft, LIMIT:5.0m/16.4ft, Maximum magnification : Approx. 0.25x / 0.5x (35mm camera equivalent) Ideally suited for the outdoors with a splash and dustproof sealed body. (When combined with splash and dustproof LUMIX G Mirrorless camera models) Impressive image stability with integrated LUMIX Power Optical Image Stabilization (O.I.S) and LUMIX Dual I.S. camera compatibility Integrated rotary tripod mount and built-in sliding lens hood