Doc Mck wrote:
I have not upgraded yet, but, with the 1.4 firmware , my Canon 24-70 L EF would not lock onto autofocus at times. MyTamron 24-70 EF works perfectly so I’ve been ok. Will try again with the “L” lens after I do the upgrade.
I don’t have any R lenses yet. Plenty of EF lenses and can’t justify the expense yet.