• [Super Telephoto Lens] Manual Focus Telephoto Lens This is not the original lens. 420-800mm focal length, f/8.3-16 aperture (non-adjustable aperture, f8.3 at 420mm, f16 at 800mm), filter size 62mm, full frame, EF/EF-S mount, made of high quality materials and sturdy. Sturdy and durable construction Long lasting • 【Upgraded Version】Upgrade to the EF/EF-S mount and attach to Canon DSLR camera without connecting T-adapter ring. If you are a fan of wildlife or moon, this lens is perfect for you • 【EF/EF-S Mount Compatible】Compatible with Canon EOS-1D Series, EOS 5D Series, EOS 6D Series, EOS 7D Series, EOS S-10D-90D Series, Rebel SL3 SL2 SL1 (250D 200D 100D) and Kiss/Level Series (Rebel T8i/850D T8i/850D T850D T) 7i/8000 D T7/2000D T6/1300D T6s/760D T6i/750D T5i/700D T5/1200D T4i/650D T3i/600D T3/1100D T2i/550D T1i/50D 4000D 3D 00D 1 500D 00D etc DSLR Camera Not compatible with M-series or R-series mirrorless cameras • 【Manual Focus】The lens has a focus ring near the front. You can manually rotate the focus ring to adjust the focus. Rotate the ring slowly until the subject you want to focus is sharp and clear • No electronic contact, no autofocus motor: Manual lens has no electronic contact, so you need to use the lens in mode M. The camera may display F00 because manual lens does not have direct access to aperture