Feature:1. 【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.2. 【T-Mount Lens to Camera Body】T mount lens with RF 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.3. 【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.4. 【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.5. 【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.Specification:Specifications:Color: WhiteMaterial: MetalMount: T2 mountAdapter Ring Mount: T2-M4/3Focal Length: 420-800mm zoom lensAperture: f/8.3 at 420mm - f/16 at 800mmOptical Constructions: 4 elements in 2 groupsZoom System: Linear push-pullExposure: Automatic exposure is available in Aperture Priority mode only for cameras with TTL metering systems; Other camera must be set in full manualFocusing: Manual helical(rotate) operation(Not AF compatible)Minimum Focusing Distance: 1.6 meters(5.25ft) from front lens Filter Size: 62mmDiameter: 69mmLength: 24-32cm/ 9.45-12.60in(with caps)Lens Dimension: 24 * 7 * 7cm/ 9.45 * 2.76 * 2.76inWeight: 659g/ 18.3oz.Package List:1 * Super Telephoto Zoom Lens1 * Adapter Ring1 * Front Cap1 * Rear Cap1 * Carrying Pouch