Especially after put the power on, the autofocus does not work. After many trying to different target the AF wakes up. Is the fault of the camera or the lens. Or maybe the photographer?
I have not used RF lenses to speak to this lens or camera combination.... But, are you finding it consistently has issues finding focus regardless of the brightness/contrast of the scene? Autofocus thrives on good contrast in the scene for the focus points to lock onto, so if the situation is dimly lit you may have some struggles. With a slower lens like a f5.6 or f8 this can show a bit more. brightly lit situations should not have any issues however so if you go outside on a sunny day and the AF is not snappy, I would think the lens may have an issue with its focus system.
do you have any images where the af was struggling, you could swith the lens / camera to manual focus at that point and take an image even if its not focused so we can see what may be causing it maybe if you have it in a Manual mode on the main dial your settings may be hard for the camera to gain focus. switching to auto mode on the main dial it should find focus straight away if conditions are normal as this will over ride any settings you would have in the camera yourself, ie if you have set iso far too bright or shutter speed far too slow the camera will ignore all that in full auto, if it still has trouble focusing there maybe something to look at with the lens or body itself
