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No offense but i do not understand the point of the 2nd picture
Maybe it wasn't a good example. Basically, I was playing around with it to see how well the outer focus points performed. (I am one of those who had been frustrated with the AF of 5D2.) In both rooms that I took these two pictures, it's not well lit. I didn't have a 5D2 at the time, but I'm positive that a 5D2 wouldn't be able to focus really well in both situations.
For the 2nd picture, it's after midnight. Outside was completely dark and the room was lit with only two 75-watt light bulbs. I tried here and there and the camera was able to to pick up focus everywhere. (Note here that my interest was only the outer focus points. I have no concern with the center one.) Then, I saw the reflection of the LCD screen and I tried it out. The picture was in focus--meaning it's the same as I saw it. (Even though nothing was particular "sharp" out of the reflection even through my own eyes, there were some contrasts there.) The outer focus points were able to pick up the bigger white grille, but not the smaller one. I found that to be good enough.
Other than that, I haven't found many other situations where the outer focus points of my 6D wouldn't be able to focus. In short, even though they're not cross-type, they work very well.
BTW, these two pictures weren't intended to answer the questions of the original poster, but to respond to your post regarding how the outer focus points struggled at Best Buy.
Hope this help clarifying the point of the 2nd picture.
Edited on Jan 16, 2013 at 04:01 PM · View previous versions