Alloy Body: Accuracy scale, manual focus design complemented by depth of field and distance scale, easy to use pre focus technology to provide , clear images. Alloy body texture is strong, beautiful appearance, fine technology. 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. Compatibility: When used with the included T2 FX adapter ring, it can be used with a half frame micro single camera X lens. 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. Physical Design: Also includes a tripod stand 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.