Feature 1 420800mm Zoom: With 420800mm super telephoto, telephoto lens is good for shooting distant scenery, wildlife, concerts, bird observation, etc. 2 Adapter Ring: The lens itself is a T2 mount, which can be installed on the telescope for moon observing, etc. Using the included adapter ring, it can be installed on the AI mount SLR camera for shooting distant objects 3 High Strength: Manual zoom type, all metal structure, optical glass also has multi layer MC coating for better strength and impact resistence, 4 Easy to Carry: High quality aluminum alloy body with exquisite texture, compact shape and volume design, easy to carry, can also be fixed by bracket ring. 5 UV Filter: Self contained UV filter can reduce the blue tone caused by ultraviolet light, helping to improve the clarity and color reduction effect.Item Type: Telephoto LensMaterial: Alloy + Optical GlassColor: As ShownLens Type: Manual FocusProduct Size: Front End Filter Diameter: Approx.67mm/2.6inLatest Focusing Distance: Approx.1.6m/63.0inFocal Length: 420-800mmOptical Structure: 2 Groups Of 4 PiecesWeight: Approx.810g/1.8lbAperture: F8.3 - F16Mount: AI MountStabilization Type: WithoutApplication: For AI Mount Camera, Such As For Nikon D850, D810, D800, D780, D750, D700, D610, D500, D300, D3100, D3200.D3300, D3400, D5100, D5200, D5300, D5500, D5600, D7000, D7100, D7200, D7500, D50, D60, D90, DF, D3, D3X And Other Camera Package List1 x Lens1 x Front Lens Cap(Installed)1 x Rear Lens Cap(Installed)1 x Storage Bag1 x Adapter Ring1 x Wrench1 x UV Filter1 x Lens Cloth1 x ManualNoteThe lens itself is a T2 bayonet with a T2‑AI adapter ring. Before purchase, please confirm whether the applicable model and bayonet meet to ensure that the product is completely suitable.