C-Mount-Canon EOS Macro EMF AF Confirm Adapter

Featuring electronic chip and communication, this adapter enables support focus prompt.The all-metal adapter is designed to fit the lens securely, yet can still be removed easily when not needed.Feature:Although the lens will fit physically, automatic diaphragm (AE metering), or other auto functions are not retained using this adapter.Both camera-side and lens-side of the adapter are made of metal, precision-machined and plated with chromiumPrecise fit and solid connection - lens has no play, gap or wiggling when mounted on adapter and no adjustments are required to fit your lens.Satin surface finish Macro shooting only, do not support focus infinity.   Allows adjust aperture & focal length, EXIF is 1mm-65535mm, f1.1-f64. Programming setting: Set the maximum aperture on the lens. Set the desired aperture on the camera. Focus and meter the object, when the focus is achieved. Set the lens aperture to the same desired aperture as the camera setting. Press the shutter button and take