It is one of the Best adapter in the market, so it is different from cheap ones. This product has specific compatibility limitations. Compatibility is very specific, depending on exact lens and camera firmware version combination, and on whether phase or contrast detect AF is used. Please make sure to check the manufacturer's compatibility chart prior to purchase. (The last picture, and you can find more information on Vello website) If a lens is not listed, it might not work properly. Vello will be testing more lenses and cameras and adding them to this table, so check back for future updates and firmware upgrades. Product Highlights : Canon EF Lens to Sony E-Mount Camera Full-Frame Lenses to APS-C Format Camera Increases Aperture by 1 f/Stop Increases Angle of View by 0.71x Enables Autofocus and Auto Exposure Retains Image Stabilization Functions Control Aperture from Camera Body Transfers Exif Data to Camera Removable Tripod Foot and 1/4"-20 Socket Matte Black Interior; Metal Construction Features : Adapts full-frame Canon EF-mount lenses to APS-C format Sony E-mount mirrorless cameras as well as full-frame cameras in APS-C crop mode Magnifies the lens' angle of view by a factor of 0.71x, effectively negating the crop factor of APS-C format cameras while simultaneously increasing the maximum aperture of the lens by one stop Optical design uses four elements in four groups to retain maximum image quality Maintains support for autofocus, auto exposure, and image stabilization Autofocus support is best with Ultrasonic (USM) and stepping (STM) motors Communicates Exif data to the camera to be saved in the image file for later reference Removable tripod foot has 1/4"-20 socket for direct mounting on a support system, eliminating unnecessary strain on the camera's lens mount Matte black interior helps reduce flare for optimal image quality Metal construction for long-term durability Autofocus and auto exposure functions are not compatible with Sony's E-mount camcorders, such as the PXW-FS7
