JINTU Wildlife Landscape SLR Camera Lens How to use a manual Lens ? Install T adapter with camera and lens together, then Set the camera to M (Manual) ModeLock the LOCK--OPEN ring on the lens BodyFocus Manually, Fine tune the front focusing ring to make your target in focus.Try to Shoot a sample PhotoAdjust the shutter Speed to get good picture quality((if the picture is too dark, set a slower shutter speed, such as 1/250S, 1/200S, 1/150S... until normal;) If The picture is too bright, set a faster shutter speed, such as 1/250S, 1/500S, 1/800S Until normal) The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. JINTU 420-800MM TELEPHOTO LENS SHOW Merchant video JINTU 420-800mm f8.3 Manual Focus Telephoto Lens for Canon EF, EF-S Mount Advances in ultra high-index / low-dispersion optical glasses, new barrel materials, and exotic anti-reflection coatings.Long distance telephoto lens . perfect for small or distant subjects, ranging from birds and wildlife, through sports, to aircraft and the like.Users can mount the lens on all types of digital reflex cameras through the universal T-mount. Free T mount adapter supply fit any Canon EOS SLR cameras.420-800mm Telephoto Zoom Lens can be use with Canon Nikon Sony Pentax DSLR/SLR/Mirrorless Cameras, just change different T mount adapter can fit different brand of cameras, other adapter can buy from our store.Compatible with cameras model: for Canon 1D, 5D, 5D II, 5D Mark IV/III/5DS/5DS R, EOS 6D, 6D II, 7D, 7D II, XS, XSI, T1i, T2i, T3, T3i, T4, T4i T5, T5i, T6, T6i, T6s, T7, T7i, T7s, 30D, 90D 80D 77D 70D 60Da 50D 40D 30D 20Da 20D 4000D 3000D 1500D 1000D 450D 400D 350D 300D EOS Rebel SL3 SL2 T8i T7 T7i T6 T6s T6i T5 T5i T4i T3i T3 T2i and other EF/EF-S mount cameras Sample Photos by Photographer Wildlife Photography Picture Elementary Tools for Astrophotography on moon Lens Parameters Focal length 420-800mm Aperture range: f8.3-16 Minimum focal length: 1.6m to 5.25ft Mini Focus Distance: 4.92ft Filter diameter: 67mm Package size: 27 * 9 * 9cm / 10.6 * 3.5 * 3.5in Lens Mount Canon EF/EF-S mount, NIKON F,FD Mount Zoom System: Linear Push-Pull Multiple Occasions for Use Note: The aperture value F8.3-16 can't be set by the camera, this is automatically changed with the focal length 420 - 800mm. UMC-- Ultra Multi Coating Optical lenses glass imported from Japan, Adopts multi-coated technology to reduce flare and ghost to get vivid color and clear images. Universal 1/4 Mounting The base with 1/4 screw down the lens makes wide application on tripod and monopod, also can use a remote and tripod to keep picture stable. Adjustable Zoom Range Adjustable from 420mm to 800mm focal range with lock system, set your desired focal length easily. Package size: 10.6 * 3.5 * 3.5 inch. Premium Quality Solid Construction with full metal body, made of high quality Aluminum Alloy. Mini Focus Distance: 4.92ft, weight: 1.9LB