The TechART/Shorten adapter has been updated with firmware 2.20 Optimize the performance with Canon 16-35mm and 24-70mm lenses Mac Version Windows Version Firmware Update Instructions Update Instructions From 2.00 (Here) Prepare a mini-USB cable and connect the adapter to a computer with Windows 8 / 10 operating system Unzip and open the application. Left-click the … Continue reading TechART/Shorten EF-FG01 Firmware Update 2.20