The EOS/NIK allows mounting Nikon F-type lenses to a Canon EOS camera. Can be used with Nikon F type lenses only. E-type and G-type lenses can not be used with this adapter - see the EOS/NIK NT for G-type lenses | Exposure metering can be Aperture Priority or Manually. No information is transferred between the lens and camera, so focus is manual. | Precise compensation of the flange difference of the two mounts allows lenses to be manually focused up to infinity | Lenses w/o aperture control ring can be manually stopped down with this adapter | Weighs 0.165 lb. German engineered and manufactured