This is a major firmware with a lot of updates on autofocus and fixes several bugs. Check out the Canon EOS R Firmware Update Version 1.40 details below.
Firmware Version 1.4.0 incorporates the following enhancement:
- Enhances eye detection Auto Focus (AF) for improved face and eye recognition at greater distances.
- Improved Auto Focus (AF) performance helps the camera to focus on and track smaller subjects.
- Reduces lag time between the actual Auto Focus (AF) and the AF frame display for images in the viewfinder or on the LCD.
- Fixes a phenomenon in which the AF frame size cannot be changed in the Servo AF setting.
- Fixes PTP communication vulnerability.
Update: Canon USA has removed the link and firmware version 1.4.0 notes for the Canon EOS R. The release date is scheduled for September 26, 2019.
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via Canon USA