The ALEXA Mini 4:3 License Key enables 3 new ProRes recording modes which access the full 4:3 sensor area and support the use of 2x anamorphic lenses. The new recording modes are: - 4:3 2.8K - 2:39:1 2K Ana. - HD Ana. In combination with the ALEXA Mini ARRIRAW License Key the ALEXA Mini 4:3 License Key will also enable MXF/ARRIRAW recording in Open Gate. Note: This License Key requires camera software update (SUP) 4.0 or greater. Please refer to the ALEXA Mini manual and SUP release notes for more detail.