Fotasy Canon EOS Lens to Fuji X-Mount X-Pro1 X-E1 adapter, with Build-in Aperture Ring Solid metal mount lens adapter allows Canon EOS Lens to be used on Fujifilm Fuji X-Pro1 X-E1 camera body With Build in Aperture control, It is a solution of using Canon EF lenses to adjust aperture in other cameras with external aperture ring. Pls note auto focus function does not work. User need to control lens manually. For bottom difference of Canon EF lens, this adapter doesn't compatible for Canon EF S lens, such as: EF S 10-22mm; EF S 15-85mm; EF S 17-55mm; EF S 17-85mm; EF S 18-55mm; EF S 18-135mm; EF S 18-200mm; EF S 55-250mm; EF S 60mm We suggest Customers to rotate the ring from 1 to 6 to adjust the aperture ring in the adapter.