CameraPlus - Autofocus Focal Reducer adapter (Full-Frame conversion adapter, Focal Reducer SpeedBooster) for Canon EOS EF on Sony E-mount - find compatible models below (AT-EF-E Speed Booster Adapter) Spend a little money to have your E mount camera as full-frame camera like A7. Every attached lens acts on a E-mount camera almost exactly like on a full frame camera (eg 50mm x 1.5 x 0.71 = 53.24mm). For Canon EOS EF on Sony E-mount - Sony Alpha a6000 a5100 A5000 A3000 NEX-7 NEX-6 NEX-5N NEX-5T 5R NEX-NEX-5 NEX-3 NEX-3N NEX-F3 NEX-VG30 VG20 VG10 VG900 C3 FS700. And since most E-mount cameras have a form factor of 1.5, is compensated by the shortening of the focal length of the camera form factor roughly. Lens mount: Canon EF lens (Not for full frame camera like A7; Magnification: 0.71x; Aperture: to be increased by one f/stop/ Material: aluminum (anodised), brass (chrome), optical glass (tempered) The other angle of more light entering the lens. This shortens the required exposure by approximately 1 stop. This adapter allows the manual use of Canon EF lenses to Sony E-mount cameras. The adapter has built-in lenses, which reduce the effect of the lens focal length by a factor of 0.71.