15mm F/4 1:1 Macro + Wide Angle FF(Full-Frame) Prime Lens for Cameras EOS 70D 77D 80D 550D

NOTE: This is a manual lens, NO Electronic Contacts, your camera will not detect the lens when mounted, that's why it shows not connecting properly, please switch to MF MODE in order to use this lens correctly. Tips to use our 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. The 15mm F/4 1:1 Macro + Wide Angle Lens is one of the widest full-frame lenses to offer a full 1:1 magnification ratio..syi