Feature: 1. High‑quality alloy body with strong texture, exquisite appearance, fine craftsmanship, and precise scale. 2. Built‑in bracket ring for easy fixation, compatible with 1/4in screw ball head tripod. 3. This product has excellent imaging sharpness, better resolution and color reproduction. 4. The 650‑1300mm ultra‑long zoom lens is a good choice for bird and wildlife photography and ultra‑long‑distance shooting. 5. 8 elements in 5 groups optical structure, multi‑layer MC coating can suppress lens flare and ghosting, improve contrast and color authenticity. 6. Fit for Nikon AI mount cameras, including for Nikon D850/D810/D800/D780/D750/D500/D7500/D7200/D5600 etc. Specification: Item Type: Telephoto LensMaterial: Alloy + Optical GlassColor: As Picture ShownFront Filter Size: Approx. 95mm/3.7inWeight: Approx. 2270g/80.1ozFocal Length: 650-1300mm Aperture: F8-F16 (not Adjustable) Mount: for AI Mount Application: For Nikon AI Mount SLR Camera Optical Structure: 8 Elements in 5 Groups Viewing Angle: 3.8° (650mm Focal Length) 2° (1300mm Focal Length) Coating: Multi-Layer MC Cating Focus Method: Manual Focus Anti-Shake Function: No Closest Focusing Distance: 5m Tripod Expansion Oort: 1/4in Screw Hole Applicable Scenarios: Landscape, architecture, people, insects, tourism, business, sports, wedding, humanities, etc. How to use: 1. Align the identification point of the lens mount with the identification point of the adapter ring, and rotate it clockwise. When you hear a "click" sound, it means that the lens has been installed in place 2. Align the identification point on the lens adapter ring with the adapter ring to the identification point on the fuselage, and rotate clockwise when you hear a "click" sound, it means it is installed in place 3. Press and hold the camera lens release button and rotate it counterclockwise to remove the lens together with the adapter ring 4. Install the adapter ring release button and rotate it counterclockwise, the adapter ring can be removed from the lens. Package List: 1 x Telephoto Lens1 x Adapter Ring1 x Wrench1 x Storage Bag1 x Manual