These are brief videos about the AF system .... no mention of IR sensing so not sure about that
https://www.youtube.com/watch?v=eExbVhK26bA
https://www.youtube.com/watch?v=DM6KkQcNI8w
These are brief videos about the AF system .... no mention of IR sensing so not sure about that
https://www.youtube.com/watch?v=eExbVhK26bA
https://www.youtube.com/watch?v=DM6KkQcNI8w