Feature: 1. ENHANCED OPTICS: This lens features a accurate optical design with 4 groups and 4 elements, along with multi coated MC coating to suppress lens flares and ghosting, resulting in improved contrast and color accuracy. 2. CAPTIVATING ASTROPHOTOGRAPHY: With its achromatic refractor design, this 500mm F6.3 telephoto lens excels in shooting breathtaking images of far away objects. Perfect for astronomy enthusiasts and photographers alike. 3. T2 AI ADAPTER: When used with the included T2 AI adapter, this lens is compatible with multiple cameras, allowing you to mount for Nikon camera with ease and expand your photography possibilities. 4. CONVENIENT PHOTOGRAPHY: Crafted with a durable alloy body, this lens not only exudes a strong aesthetic appeal but also ensures excellent performance and longevity. It comes with a detachable lens hood and tripod mount bracket for added convenience and vertical horizonally shoot. 5. DISTANCE SCALE: The manual focus design, coupled with depth of field and distance scales, enables you to achieve clear images effortlessly. Perfect for shooting intricate details in your shots. Specification: Item Type: Telephoto lens Material: Alloy, optical glass Weight: Approx. 1671g / 58.9oz Optical Design: 4 elements in 4 groups Focal Length: 500mm Minimum Focus Distance: 5 meters Aperture Range: F6.3 to F32 Front Filter Diameter: 86mm / 3.4in . Package List: 1 x Lens2 x Lens Cover1 x Converter1 x Wrench1 x Storage Bag1 x Manual