Lens Not Attached : MANUAL LENS need you to enable "M mode " or "Release without lens" in the setting of camera Wide aperture of T2.1, minimum focusing distance of 60cm, Lens construction is 12 elements in 8 groups, multi layer coating, capable of delivering sharp and clear video With full coverage on Full Frame and APS-C sensors; Angle of view 46.4° on full frame cameras, 29.6° on APS-C cameras; Solid metallic constraction and easy to use on Canon cameras with EF mount. Suitable for lanscape and portrait shooting MEKE 50mm T2.1 Large Aperture Manual Focus Full Frame Prime Cine Lens for EF Cameras