Supports USB-free Firmware Upgrade Firmware of the lens can be upgraded through camera instead of using USB port, which not only meets the requirements of firmware upgrade and appearance design, but also avoids the incompatibility problems caused by different computer operating systems.（Note: this function needs to be supported by camera） F1.8 Bright Aperture Maximum aperture F1.8,bokeh effect is Read more......
Published By: Canonrumors - Monday, 14 May, 2018