• 【Excellent Compatibility】This electronic mount adapter can attach EF/EF-S series lens to Canon EF/EF-S Lens to SIGMA FP Panasonic S5 S1 S1R S1H Leica SL601 SL2 Full Camera Compatible models can be found on this website https://www.commlite.com/product/49.html • Includes USB Port: This mount conversion adapter has a USB port on the main unit, so you can update the firmware through it. Please check the official website https://www.commlite.com/ • AF Function & Metal Electronic Contacts: This camera mount lens adapter ring has a built-in metal electronic contact, ensuring high efficiency conductivity and high speed transmission. Supports functions such as high-speed autofocus, camera side aperture adjustment, EXIF signal transmission, IS hand shake correction • 【1/4" Screw Hole & Durability Available】This electronic mount adapter has a 1/4" screw hole and can be attached directly to a tripod. Aluminum alloy and brass construction gives the lens a classy surface that won't wear out. It can be tightened to provide better protection for your camera and lens • Our company has been engaged in the camera parts industry for many years, providing high quality, low price products and perfect services. Rest assured. If you have any problems, please contact us