Viltrox EF-EOS M2 Mount Adapter For Canon EF-mount series lenses to EF-M

Viltrox EF-EOS M2 mount adapter is designed to allow Canon EF-mount series lenses

to be used on interchangeable-lens digital cameras that compatible with EF-M lens. 

Focal length is multiplied by 0.71 based on the original (equivalent focal length =

focal length x 0.71), which helps enlarge 1 level aperture. It is also built in 4 groups,4pcs 

optical glasses. 

By adapter mounting it can achieve functions of EXIF signal transmission, AF(autofocus) 

and adjustable aperture,etc. Firmware upgrade is via the USB port.