Lightdow 420-800mm f/8.3 Manual Zoom Super Telephoto Lens + T-Mount for Canon EOS Rebel T3 T3i T4i T5 T5i T6 T6i T6s T7 T7i SL1 SL2 6D 7D 7D 60D 70D 77D 80D 5D II/III/IV DSLR Camera Create Sharp High Quality Images, Comes with Lens Pouch and Protective Caps. Multi coated low-dispersion glass, anti-reflection coating, manual focus telephoto zoom lens to use with DSLR SLR cameras. 420-800mm f/8.3-16 Manual Telephoto Zoom Lens for Canon EOS Rebel T7, T7i, T6, T6i, T5, T5i, SL2, 80D, 77D, 700D, 70D, 60D, 50D, 5D, 6D, 7D, 600D, 550D, 200D, 150D, 100D, 1300D, 1400D, 1500D etc Backed with Lightow's 12-Month Return for Refurbish/Replacement Manufacture Warranty. NOTE: This is a manual lens, NO Electronic Contacts, your camera will not detect the lens when mounted, that's why it shows not connecting properly, please switch to MF MODE in order to use this lens correctly. Tips to use our Manual Lens: 1) Set the mode dial to Manual (M). 2) Set the Release w/o Lens option in the camera menu to Enable. 3) Set the Shutter lock option in the camera menu to Off: no lens. 1 * 420-800mm f/8.3-16 Manual Telephoto Zoom Lens with retail package 1 * T Mount for Canon Filter diameter: 67mm elements in 2 Groups Aperture Range: 8.3-16 Focal length: 420-800mm Minimum Focusing Distance: 1.5m / 4.92ft Filter diamater: 67mm Package size: 27 * 9 * 9cm / 10.6 * 3.5 * 3.5in Package weight: 860g / 1.9LB