aperture Increase by 1 level, AF auto focus,EXIF signal transmission Smaller length, viewing angle The EF-EOSM2 has 4 groups of 4 optical lenses, and the length is multiplied by 0.71 on the original basis;Make the effective length smaller and a range Support for M Micro-single-lens camera EF-EOSM2 is compatible with for M mirrorless camera body, allowing your camera to have a wide range of EF lenses; adding infinite possibilities to AF autofocus EF- M2 can provide you with a fast and smooth focusing experience. Simply pressing the shutter button to focus is the basis for barrier-free creation. The M43 body is seamlessly connected to the lens, and the aperture, shutter, ISO and other setting values can be quickly adjusted, allowing you to focus more on framing, composition and other content Compatible lenses: for EF mount lenses Focus mode: Auto focus Optical lenses: 4 groups of 4 lenses Model:EF-EOSM2 Compatible cameras: M Micro-single Tripod slot: CU1/4inch removable length factor: 0.71X Firmware upgrade: USB upgrade interface (The product appearance and printed words depending on the batch, but this does not affect use) Color: As Shown Material: plastic Package Contents: 1 * Autofocus Speed Booster Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.