420-800mm F/8.3 Manual Zoom Super Telephoto Lens + T-Mount (Full Frame) for Canon E F/Rf Camera

DescriptionUser manual: this is a manual lens without electronic contacts, which is why your camera cannot recognize the lens. it requires complete manual settings of the camera and lens body. please switch to mf mode to use this lens correctly. manual lens usage prompt: 1) set the mode dial to manual (m); 2) set the release w/o lens option in the camera menu to enabled; 3) set the shutter lock option to off in the camera menu: no lens.Features:420-800mm f/8.3-16 manual telephoto zoom lens.Manual focus telephoto zoom lens to use with dslr slr cameras.Multi coated low-dispersion glass, anti-reflection coating.Create sharp high quality images.Comes with lens pouch and protective caps.