1Advanced Optical Design: The lens features a 4 groups 4 pieces optical structure with multi layer MC coating, suppressing lens flares and ghosting for improved contrast and color accuracy. 2Chromatic Aberration Free Refractive Lens: With precise chromatic aberration free refractive lens, this lens delivers images with high peak contrast and excellent control over flaring. Ideal for use in "M" manual exposure mode. 3Wide Compatibility: When used with the included T2 AF adapter ring, this lens is compatible with A mount cameras, allowing you to experience its outstanding capabilities on your single lens camera. 4Superior Craftsmanship: The lens also features precise calibration with manual focusing, depth of field, and distance scales, ensuring clear images. The premium alloy construction guarantees durability and a exquisite appearance. 5Great Accessories: The lens comes with a tripod mount and detachable lens cap, effectively reducing lens flares and ghosting. The rotatable tripod collar provides excellent balance and quick vertical format shooting. 6Versatile Applications: The 500mm f/6.3 telephoto lens is a fantastic choice for bird and wildlife photography, as well as long distance shooting. It offers exceptional image quality and performance.