My 35mm and 24-105mm RF lenses both have a A/M switch on the lens body for Auto AF or Manual AF.
I have found the Canon x1.4 Extender Mk III to be very useful, with excellent IQ and responsive AF provided I maintain sound shooting techniques to avoid camera shake.
Cheers
Dennis
Thanks Dennis - that is interesting to hear. When I do upgrade to a mirrorless Canon I suspect I will use my existing lenses for some time before I can update to the RF lenses.
I have the Canon x1.4 Extender Mk II so perhaps the Canon x1.4 Extender Mk III is better - or more likely it is my technique that needs improving. My main use of it has been stalking deer on Exmoor so all hand held and subject far away and lousy light too I recall.
) I have been very pleased with the results from both extender models, for subjects that are close enough not to be affected by ground hugging air currents or crud in the air which damages the image quality.




