Problem with starting focussing on R5

xps

EOS R
Oct 19, 2011
1,007
114
Middle Europe
My R5 is suffering from AF problems until 2 weeks. (Not sure if after or even before installing Firmware 1.4).
The AF often does not start focussing on objects. I have to press the AF button (or the back-button AF-button) several times - or change the AF manually on the lens ring - to get the autofocus getting started.
Used every AF-setting and every AF-point if this behavior could be changed, but nothing helps.

I resetted the body several times to factory defaults. As I my other lenses and Canon bodies are actually in my house in southern Europe, I just do have the 600mm EF version II with the R5 here, so I can not look, if it is happening on other lenses too.

Any advice?
Thank you a lot
 

Jack Douglas

CR for the Humour
Apr 10, 2013
6,850
2,471
Alberta, Canada
My R5 is suffering from AF problems until 2 weeks. (Not sure if after or even before installing Firmware 1.4).
The AF often does not start focussing on objects. I have to press the AF button (or the back-button AF-button) several times - or change the AF manually on the lens ring - to get the autofocus getting started.
Used every AF-setting and every AF-point if this behavior could be changed, but nothing helps.

I resetted the body several times to factory defaults. As I my other lenses and Canon bodies are actually in my house in southern Europe, I just do have the 600mm EF version II with the R5 here, so I can not look, if it is happening on other lenses too.

Any advice?
Thank you a lot
I doubt this is much help but it kind of fits the topic. I have the shutter as spot AF and AF-ON as animal eye AF and the * button is another mode of back button focus. I noticed only recently that while the AF-ON button works independently and will initiate focus, the * button will only perform its assigned AF mode if the shutter is half pressed. This is not desirable and not how my 1DX2 behaved.

I don't have any suggestion for your specific issue especially given you've tried lots of different settings. Sorry.

Jack
 

rico.29

EOS M50
Feb 27, 2021
33
5
did you solve your problem? i've the same with R5 and 500mm f4 mk1, no AF no matter the AF settings.
when i switch to 100-500mm RF, AF seems ok, i only have the problem with 500mm mk1... :(
 

EricN

EOS 90D
Aug 10, 2021
129
227
did you solve your problem? i've the same with R5 and 500mm f4 mk1, no AF no matter the AF settings.
when i switch to 100-500mm RF, AF seems ok, i only have the problem with 500mm mk1... :(
how does the image quality compare between 500 f4 mk1 and 100-500?
 

rico.29

EOS M50
Feb 27, 2021
33
5
here is full image with 100-500mm RF, at 500mm, f7.1, 1/640, iso 200, on tripod
1636456272882.png


and cropped at 100%
G76A38262.JPG
 
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