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 Wrench 1 x Storage Bag 1 x Manual 1Physical 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. 2Lens 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. 3Optical 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. 4Accurate 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. 5500mm 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. 6Compatibility: 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. 7Exquisite Workmanship: The 500mm F6.3 prime telephoto lens has alloy body which has a strong texture, exquisite appearance, and exquisite craftsmanship.