Feature: 1. Physical Design: With a small tripod mount bracket and a removable lens hood to help minimize lens glare and ghosting. The rotatable tripod holder provides optimal balance and allows for quick and easy vertical format shooting during rotation. 2. Lens Type: The 500mm F6.3 telephoto lens adopts a precise achromatic refractor design, which can obtain images with good peak contrast and flare control. You can use this lens in the "M" manual exposure mode. 3. Optical Design: The 500mm F6.3 telephoto lens has 4 sets of 4 optical structures, and multi layer coating can suppress lens spot and ghosting, improve contrast and color authenticity. 4. Accurate Calibration: The manual focusing design is complemented by depth of field and distance calibration, making it easy to use pre focusing technology to provide sharp and clear images. 5. 500mm F/6.3 Achromatic Refraction Telephoto Lens: 500mm F/6.3 ultra long prime lens is a good choice for bird and wildlife photography and ultra long distance photography. 6. Compatibility: When used in conjunction with the included T2 PK mount adapter ring, 500mm F6.3 prime telephoto lens is suitable for DSLR camera KA mount lens. 7. Exquisite Workmanship: The 500mm F6.3 prime telephoto lens has alloy body which has a strong texture, exquisite appearance, and exquisite craftsmanship. Specification: Item Type: 500mm F6.3 Prime Telephoto Lens Product Material: Alloy, Optical Glass Weight: Approx. 1660g / 3.7lb Lens Structure: 4 Pieces And 4 Sets Focal Length: Approx. 500mm / 19.7in Nearest Focusing Distance: Approx. 5m / 16.4ft Aperture: F6.3-F32 Front Filter Aperture: Approx. 86mm / 3.4in. Package List: 1 x Lens 2 x Lens Cover 1 x Adapter Ring 1 x Wrench1 x Storage Bag 1 x Manual