???This AF Confirm M42 Lens to Canon Eos Adapter allows you to use your M42 lens on your camera， saving you the expense of a costly and irreversible conversion. To use， simply attach the ring to your lens and then the lens to the camera.                                    Features            New， never used<br>The ring enables camera viewfinder focus confirmation light and confirmation sound<br>Supports AV (Aperture Priority) and Manual Mode<br>EXIF is fixed 50mm f2.0<br>Material: Brass<br>Color: Silver<br>                                                                                                Package Includes            1 x AF Confirm M42 Lens to Canon Eos Adapter<br>