Feature: 1. 420‑800mm Zoom: With 420‑800mm 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. Specification: Item Type: Telephoto Lens Material: Alloy + Optical Glass Color: As Shown Lens Type: Manual Focus Product Size: Front End Filter Diameter: Approx.67mm/2.6in Latest Focusing Distance: Approx.1.6m/63.0in Focal Length: 420-800mm Optical Structure: 2 Groups Of 4 Pieces Weight: Approx.810g/1.8lb Aperture: F8.3 - F16 Mount: AI Mount Stabilization Type: Without Application: 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 List: 1 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 Manual Note: The 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.