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 Lenses - KD-420800-T-N

• User Instruction: This is a MANUAL lens, NO electronic contacts, that's why your camera will not recognize the lens, it requires full manual settings on camera & lens body., please switch to MF MODE in order to use this lens correctly. Tips to use 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. Fine tune the front focusing ring to make subject in-focus and take a sample picture. If the picture turns out dark, take the following steps to improve, 1. Lower the shutter speed, from 1/500s down to 1/100s or slower 1/50 etc. 2. Raise the ISO Number, from ISO 100 to ISO 200/400/800 etc. 3. Use a remote shutter release and tripod to increase image stability. 4. Switch position to allow more environmental light coming through the lens into the camera imaging sensor. Multi coated low-dispersion glass, anti-reflection coating, manual focus telephoto zoom lens to use with DSLR SLR cameras. ADVANCED OPTICS / SUPER ZOOM / SOLID FULL METAL CONSTRUCTION / MANUAL FOCUSING 420-800mm f/8.3-16 Manual Telephoto Zoom Lens Compatible/Replacement 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