Feature:1. Optical Design: 4 groups of 4 pieces of optical structure, multi layer MC coating can suppress lens spot and ghost, improve contrast and color authenticity.2. Lens Type: A accuracy achromatic refractor design for nice peak contrast and flare control images. You can use this lens in "M "manual exposure mode.3. 500mm F6.3 Achromatic Refraction Telephoto Lens: The 500mm F6.3 ultra long zoom lens is a nice choice for bird and wildlife photography as well as ultra long distance shooting.4. Compatibility: When used with the included T2 FX adapter ring, it can be used with a half frame micro single camera X lens.5. Physical Design: Also includes a tripod mount and detachable lens hood to help minimize lens ghouls. A rotating tripod mount provides optimal balance and allows quick and easy vertical format shooting when rotated.6. Alloy Body: Accuracy scale, manual focus design complemented by depth of field and distance scale, easy to use pre focus technology to provide sharp, clear images. Alloy body texture is strong, beautiful appearance, fine technology.Specification:Item Type: 500mm F6.3 Manual Focus Telephoto LensWeight: 1722g or 60.7ozMaterial: Alloy and optical glassLens Structure: 4 elements and 4 groupsFocal Length: 500mmNearest Focusing Distance: 5m or 16.4ftAperture: F6.3-F32Front Filter Diameter: 86mm.Package List:1 x Lens2 x Lens Cap 1 x Adapter Ring 1 x Wrench 1 x Storage Bag 1 x Instructions