RainbowImaging V5 Lens Mount Adapter with Program EMF AF Focus Confirmation Chip for Nikon Lens To Canon EOS EF Mount adapter, for Canon 1D Mark II, Mark III, 1Ds 5D 5D Mark II, 7D, 60D, 50D, 40D, 30D, 20D, 550D, 500D, 450D, 1000D etc This adapter allows you to use Nikon Mount Lens in EOS cameras with AF-confirmation indication. Please note the lens must have F-Stop. (Not for Nikon G AFS lens) With the help of the incorporated AF-Confirmation chipset, it will be indicated by the accurate auto-focus system of EOS camera with a red light and a sound signal, user does not need to guess the correct focus by naked eye. With V5 Program EMF AF Focus Confirmation Chip, set designed Aperture and Focal Length freely. You can set designed aperture in interval from F1 to F64. You can set designed focal length in interval from 1mm to 65535mm. Date can be save even turning off the camera.(Other chipset is with fixed data of aperture and focal length). Allow focus to Infinity. AV / M Mode is supported Compatible to Nikon lens and Canon EOS EF EFs Mount camera, for Canon 1D Mark II, Mark III, 1Ds 5D 5D Mark II, 7D, 60D, 50D, 40D, 30D, 20D, 550D, 500D, 450D, 1000D etc