Solid metallic constraction and easy to use on cameras with EF mount. Wide aperture of T2.1, minimum focusing distance of 0.3m, Lens construction is 14 elements in 9 groups, multi layer coating, capable of delivering sharp and clear video With full coverage on Full Frame and APS-C sensors; Angle of view 83.4° on full frame cameras, 60.1° on APS-C cameras; Suitable for lanscape and portrait shooting Lens Not Attached : MANUAL LENS need you to enable "M mode " or "Release without lens" in the setting of camera 1