Features: EF-M adapter allows EF/EF-M lenses to be used with Canon EOS M mirrorless cameras, providing greater lens compatibility. Maintains auto focus (AF) functionality. Precise aperture alignment through the mount adapter. Built-in anti-shake function. Durable construction with a zinc alloy core for enhanced strength. Gold-plated electrical contacts ensure optimal signal transmission. 1/4-inch female thread for tripod mounting. Note: AF performance may be slower when using prime lenses; manual focus is recommended in such cases. Specifications: Compatible lenses: Canon EF series lenses Compatible cameras: Canon EOS M mirrorless cameras Front mount: Canon EF mount Rear mount: Canon EOS M mount Tripod screw: 1/4-inch screw Maximum diameter and length: 7.2 x 8.4 cm / 2.8 x 3.3 in Package dimensions: 12 x 10 x 6.5 cm / 4.7 x 3.9 x 2.6 in Package weight: 300 g / 10.6 oz Package List: 1 x Lens Mount Adapter 1 x User Manual