Showing results for 
Show  only  | Search instead for 
Did you mean: 

R5C Firmware BUG on RF L lenses


I upgraded Yesterday (February 20, 2024) and I think is the biggest mistake the was fantastic, after updating to my RF lenses L lenses (RF 15-35mm f/2.8 L IS USM & RF 70-200mm f/2.8 L IS USM) do not work as they should work (I shoot mostly 8K RAW ST not LT) and the IS - Enhanced Image Stabilization do not work any more There is a note that says "This function is not compatible with the current Lens" and I am lost trying to fix this problem, I tried to downgrade to the and I couldn't, I tried everything and no luck, my only solution now is making CANON aware of the bug and let them fix in a soon to be release new Firmware PLEASE!, I just lost a whole day of shooting trying to figure out and fix the issue with absolute no luck.

Please Fix this canon!  



Product Expert
Product Expert

Hello fitopardo,

There are some settings to take a look at. I would suggest contacting our phone support when they are in office (Tuesday & Thursday) where they can grab the gear and go through some things with you in real time to troubleshoot this further. A firmware update shouldn't take away features typically. If you would like to speak with a Canon representative, please contact our Technical Support Team at 1-800-652-2666, Monday through Friday between 9:00 am to 9:00 pm ET and Saturday between 9:00 am to 7:00 pm ET. 


Hi @fitopardo, same problem here.

Did you get a solution for this bug?

click here to view the gallery