How to Use: 1. Open shutter release: No lens (if any), set the camera to M mode. 2. Adjust the lens to the desired aperture and focal length. 3. Fine tune the front focusing ring to focus the object and take sample photos. If the picture darkens, set one of the following steps. Reduce shutter speed from 1/500s to 1/100s or 1/50, etc. Specification: Item Type: Super Telephoto Lens Weight: Approx.828g / 29.2oz Material: Alloy + Optical Glass Focal Length: 420-800mm Aperture: F8.3 - F16 Mount: EF Mount Optical Structure: 2 Groups And 4 Pieces Front End Filter Diameter: Approx.67mm / 2.6in Nearest Focusing Distance: Approx.1.6m / 63.0in Lens Type: Manual Focus Anti Shake Type: Without Anti Shake Applicable Models: Suitable For EOS 5D4, 5D3, 5D2, 5D, 5Ds, 5DsR, 6D, 6D2, 7D, 7D2, 90D, 80D, 77D, 70D, 60D, 50D, 40D, 30D, 20D, 10D, 200D, 800D, 1500D, 1D, Rebel T8i, T8, T7i, T7s, T7, T6i, T6s, T6, T5, T5, T4i, T3i, T3, T2i, T1i, SL3, SL2 And SL1 Etc. Package List: 1 x Lens 1 x Front Lens Cover (Installed) 1 x Rear Lens Cover (Installed) 1 x Storage Bag 1 x Adapter Ring 1 x Wrench 1 x UV Filter 1 x Lens Cloth 1 x Manual