Features: 【Super Telephoto Zoom Lens】The lens features manual focusing in F/8.3-16 aperture at 420-800mm focal length, to separately control the super focal zoom from DSLR SLR cameras. 【T-Mount Lens to Camera Body】T mount lens with M4/3 mount adapter ring, replacement for Panasonic G9 GH5 II GX7 GX8 GX9 GX850 G90 G91 G95 G100, Olympus E-M1 E-M5 E-M10 I II III E-PM2 E-PM1 Pen-F E-M1X. 【Functional Structure】The lens consists of 4 elements in 2 groups, with lock to fix the lens for precise working. Whole metal structured body provides with tough and durable constructions. 【Ultra Multi Coating】Adopts multi-coated technology to reduce flare and ghost to get vivid color and clear images. Premium optical lens provides high light transmittance. 【Universal 1/4 Mounting】The base with 1/4 screw thread down the lens makes wide application on tripod and monopod, the base with ring can rotate, convenient to install in seconds. Specifications: Color: Black/ White(optional) Material: Metal Mount: T2 mount Adapter Ring Mount: T2-M4/3 Focal Length: 420-800mm zoom lens Aperture: f/8.3 at 420mm - f/16 at 800mm Optical Constructions: 4 elements in 2 groups Zoom System: Linear push-pull Exposure: Automatic exposure is available in Aperture Priority mode only for cameras with TTL metering systems; Other camera must be set in full manual Focusing: Manual helical(rotary) operation(Not AF compatible) Minimum Focusing Distance: 1.6 meters(5.25ft) from front lens element Filter Size: 62mm Diameter: 69mm Length: 24-35cm/ 9.45-13.38in(with caps) Lens Dimension: 24 * 7 * 7cm/ 9.45 * 2.76 * 2.76in Weight: 659g/ 18.3oz Packing List: 1 * Super Telephoto Zoom Lens 1 * Adapter Ring 1 * Front Cap 1 * Rear Cap 1 * Carrying Pouch