I tried the search function here on POTN but didn't find anything on this problem...
I was reading on a Swedish forum about a serious AF aligment problem on the 5DmkII.
The guy testing could not get consistant results when trying to adjust a lens with the Micro Adjust feature. The results shown was just terrible.
He had two 5DmkII and both showed the same problem. Another guy did the same test with his camera and had the same result!!
Now, I thought this was a bit alarming so I decided to check it out.
This is how the test was performed
- Lense used, my brand new 50/1.4, set at 1.4
- Camera on tripod
- Distance to object abt 1 meter
- AF mode in One Shot
- Select center AF point
- First auto focus on your hand or whatever
- Refocus on object and take the shot
- Repeat/refocus between each shot
- After the third shot, use manual focus, live view, magnify x10, and do your best
(let's forget about the exposure... I had different light during the sessions)
The full picture
I aimed for the barcode in the center of the box
As I was stunned I repeated the test again with the following result
Well, what can you say...
I tried the same set up with my 24-105, set at 50mm and f4
One should note that when using a faster lens, like the f1.4, the camera is also using the 6 invisible AF points.
The guy with the two 5DmkII bodies had them both realigned at Canon service and after that - all OK
My 5DmkII body is going back for realignment next week!
(FWIW, I also tried the 50/1.4 on my 40D the same way as above with perfect result)
Anyone else having problems with focus shifting??
It feels like a bad quality control issue......