Feature: 1. Greatest conductivity due to gold-plated pins for the signal transmitting. The AF is slow when use for prime lens ,manual focus would be better. 2. Maintain of Auto Focus (AF) function. 3. Greatest conductivity due to gold-plated pins for the signal transmitting. 4. EF-M adapter is able to adapt EF/EF-M lens to Canon EOS M mirrorless Camera, which allows you to have more purchasing choices of lens. 5. 1/4 Female thread screw for mounting onto the tripod. 6. Built in anti-shaking function. More robust and stronger due to zinc alloy core. 7. Aperture exactly being aligned via the mount adapter. 8. Maintain of Auto Focus (AF) function. Aperture exactly being aligned via the mount adapter. Specification: Features: EF-M adapter is able to adapt EF/EF-M lens to Canon EOS M mirrorless Camera, which allows you to have more purchasing choices of lens. Maintain of Auto Focus (AF) function. Aperture exactly being aligned via the mount adapter. Built in anti-shaking function. More robust and stronger due to zinc alloy core. Greatest conductivity due to gold-plated pins for the signal transmitting. 1/4 Female thread screw for mounting onto the tripod. Note: The AF is slow when use for prime lens ,manual focus would be better. Specification: Compatible lens: for Canon EF series lens Compatible cameras: Canon EOS M mirrorless Camera Front mount: for Canon EF mount Rear mount: for Canon EOS M mount Tripod screw: 1/4 screw Max. diameter and length: 7.2 * 8.4cm / 2.8 * 3.3in Package size: 12 * 10 * 6.5cm / 4.7 * 3.9 * 2.6in Package weight: 300g / 10.6oz Package List: 1 * Lens Mount Adapter 1 * User Manual(English & Chinese) Package List: 1 * Lens Mount Adapter 1 * User Manual(English & Chinese)