With this adapter, you can use Canon EOS EF mount lens on Samsung Samsung NX Mount NX1000 NX300 NX210 NX200 NX20 NX10 NX5 Camera Body * It allows Lens foucs to infinity. * The adapter has no electrical connection and diaphragm & focusing are required to be set by manual. * User can use this lens adapter combined with other lens adapters, eg.use it with a Nikon-EOS adapter, then you can use Nikon lens on Samsung NX10 camera. * NO Play Locking