EOS RP front focus with EF lenses - Please CANON add MFA to RP!

StefanD wrote:

Lukens wrote:

Hi.
Did solve ur problem?

Ive noticed same problem with my Eos R. Same lenses 85 1.8 usm and 50 usm plus converter Canon one. These are not L lenses .

Whats funny about this.

When I’m shooting in vertical position (trigger on top) and I’m trying get sharp face on object. Front focus on both lenses.

Now I flip camera to horizontal position everything is ok.

And another thing. I flip camera to vertical position but trigger this time on bottom. Face is sharp no front focus.

Cant understand that.

It causing problem because in vertical position trigger at bottom I can’t use grip because it’s very uncomfortable.

Anyone got similar issues?

I tested on tripod, hands about 100pic done plus 4 photo sessions. I thought it’s my fault, shaking hands. Low light etc. I went through everything.

Problem still exists.

Did you try focus bracketing to test this? The tests I see here all use a target with sloped rulers at the side which are very hard to setup with millimeter accuracy.

If you use a flat target and start a focus bracket sequence with the camera performing AF for the first frame, you should see an increase in sharpness for the first few frames if the camera is indeed front focusing.

I just did the test I described with my 85 f/1.8 and got a curious result: Using focus bracketing with the minimum setting for "Focus increment", the first two shots were visibly front focused. Shots 3 and 4 were sharp and then focus shifted again. (flat target at about 2.5 meter and f/1.8)

What's curious about this, is that a test shot in single shot mode (so focus bracketing disabled) was as sharp as the 3rd and 4th in the bracket sequence.

Maybe focus bracketing deliberately starts a bit in front of the initial focus setting? (which would make sense, I think)

I realized another way to check focus accuracy: just set the magnification to 10x and then autofocus. This shows that my 85 f/1.8 focuses accurately. No visible front-focus whatsoever.