Canon 5D3 focus issue...

Started Nov 22, 2012 | Discussions thread
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goshigoo
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Canon 5D3 focus issue...
Nov 22, 2012

When focusing pure vertical lines; the AF points highlighted are not as sensitive as the other 2 AF arrays in the middle 3 columns; as if they are non-cross AF points....
but those AF points work better (more like cross points) in bright light
I took my 5D3 to the service center and they confirmed that it is a problem and replaced the AF unit; but I still see the same issue even after replacing the AF unit...

I have tried the demo 5D3 units in the showroom using 2 different lenses - it has the same behavior!

I would like to ask if you can help to test those AF points with your 5D3

I tested it using wall corners with single point AF; and just move the AF points between the middle column and the right column while holding the camera in landscape mode
The lens would keep hunting focus when using the middle-right column but it nails the wall corner instantly when using the middle (or middle left) column

Canon EOS 5D Mark III
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