• Manual Adjustment: This is a complete manual lens with no electronic contacts. The camera cannot detect the lens after installation. Please switch to MF mode for correct use. Tips for using manual lens: 1) Set the mode dial to manual (M) to connect telephoto lens and T-ring adapter to camera • Compatible Canon EF Lenses: 420-800mm f/8.3-16 manual telephoto zoom lens. Compatible with Canon EOS Kiss X10i X10 X9i X9 X8i X7i X6i X5 X4 X3 X2 X90 X70 Digital X Digital N; EOS Rebel T8i T7 T7i T6 T6i T5 T5i T4i T3i T3i T2 i T1i SL 3 SL2 XSi; EOS 10D 20D 30D 40D 50D 60D 70D 80D 90D 100D 200D 250D 300D 350D 400D 450D 550D 600D 650D 700D 750D 80D 8500D 850D 850D D 1000 D 1100D 1200D 1300D 1500D 2000D 3000D 4000D 9000D/77D 760D/8000D 1D X Mark III/II/1DX,5D Mark IV/III/5DS/5DS R,6D Mark II/6D,7D Mark II • Warm Tip: The camera does not display aperture value, and does not have auto focus or image shake correction, so it is recommended that you use a tripod at the same time to stabilize the image. Manual focus telephoto zoom lens is suitable for DSLR cameras. Not for Canon Mirrorless Cameras • How to use the manual lenses: The manual zoom lens requires fine tuning the front focus ring to focus on the subject and take an example. If your pictures are dark, you can improve the shutter speed from 1/500 second to 1/100 second, or slower 1/50 second, raise the ISO number from ISO 100 to ISO 200/400/800, and switch the position to let more ambient light enter through the camera imaging sensor through the lens • Metallic Luxury: The metal body has a delicate texture and sturdiness. High quality optical glass lens, high transmittance, clear image quality. Multi-layer low-dispersion glass, non-reflective coating, mirror surface has undergone oxidation treatment, to prevent the lacquer from falling off and wear resistant