Canon r5 back forcusing - micro AF adjustment missing???

I have a brand new Canon R5. I noticed a horrible back focusing with my 35mm 1.4 Mark I. lens.
I have tried to micro-adjust focusing but apparently there is no option for micro-adjust AF in the menu...??
Anybody facing the same problem????
Thanks!

What would you micro-focus adjust in a mirrorless camera? The MFA feature is there to account for the difference between the light path to the focus sensor and the light path to the image sensor as they are different in a mirrored camera. In a mirrorless camera the focus sensor is the image sensor so there is not a different light path. Does the miss focus only happen when PD focusing is used or does it also miss using live view focus?

Hi,

There's no MFA because the mechanism of mirrorless no longer needs to account for the mirror system at all.

Are you using servo/constant focus or single shot focus?

And are you at the minimum focus distance or less of your lens?

Very best,

The MFA is needed in a dSLR NOT because of any pentaprism consideration, but because there is a semisilvered portion of the reflex mirror which allows light to stike a secondary mirror attached to the back of the reflex mirror, and that secondary mirror reflects light DOWN to the AF sensor at the bottom of the body. MFA allows the user to compensate for different light path length to the AF sensor.
Mirrorless does away with the AF sensor at the bottom of the body, but uses data originating from the image sensor itself, so there is no purpose in a MFA.

oharing wrote in post #19226657
I have a brand new Canon R5. I noticed a horrible back focusing with my 35mm 1.4 Mark I. lens.
I have tried to micro-adjust focusing but apparently there is no option for micro-adjust AF in the menu...??
Anybody facing the same problem????
Thanks!

This might be due to focus shift as the lens stops down to the shooting aperture. In general, the focus of any lens will vary (slightly usually) with the aperture. So if you focus wide open with a fast lens like the f/1.4, then the focus will shift a bit (perhaps "horrible" to you). Maybe there is a way to have the R5 focus with the lens stopped-down. (I have the R5 but don't know the answer for now.)

Edit: I suppose shooting with the DOF preview button depressed would allow stopped-down focusing. I haven't tried it because on my camera, that button is assigned to another function.

Strange is that the camera does it with this lens only.

oharing wrote in post #19227020
Strange is that the camera does it with this lens only.

It could be a fault with the lens focused by PD. Does it work with LV focusing?

gjl711 wrote in post #19227033
It could be a fault with the lens focused by PD. Does it work with LV focusing?

Let me try!