I've made them fit the page but have included a magnification in each one where you can see that the very narrow dof has been achieved over the focus point.
Are the corner pips really 100% crops? If so, the dof is indeed to wide to test the outer pt. performance. I don't doubt the outer af points focus *somewhere*, but they either tend to hunt (mostly on my 17-40L for some reason or another) or miss critical focus (indeed as speculated 70-300L @200-300mm, focus on the eyes).
What I was trying to show was that the AF accuracy at f1.6 was way more than f5.6. To this end the 2m dof was 'very narrow' compared with the 12m dof that f5.6 would have given.
The examples were in reply to the comments you made about this, and could be demonstrated by attaching the very small, but fast loading files.
The page has had around 1000 views overnight ( UK time) so hopefully some people have found it interesting, despite the ridicule of Mr Skirball.
The smallest dof that I can achieve with my gear is 6mm. This is with the 50mm at minimum focusing distance at f1.4. Please note: the 50mm f1.4 at minimum focus distance and f1.4 and off centre is crap. I took three consecutive frames using the 2 o'clock outer point using the bottom of the eye as a target in low light; EV 3 to be precise. Each time, as before, I turned away focus manually so the camera had to re focus each time.
You will see that in each consecutive frame the camera has produced focus within the 6mm depth of field. There is perhaps a 1 or 2 mm variation, but the end result is the same: it's in focus. ( In fact at this distance this lens/body combo is back focusing a touch).
Now I would argue that for the vast majority of 6D owners ( and 5DII for that matter) this performance is absolutely acceptable.
The last frame is me attempting to manually focus using live view, but as you can see I have not succeeded; the manual focus on the 50 '1.4 just isn't good enough. I also tried live view contrast focusing but the focus zone is too big.
I am not saying the 6D/5D AF is anything like the 1 series and 5DIII, but I am saying that people who state the outer points are 'useless', 'pointless' etc are talking out of their collective behinds.
The crops are 100% of full resolution. As I said, don't expect it to be razor with that lens at that aperture at that part of the frame.
There is one other thing to consider though: dust. I find that the single orientation points are highly susceptible to contamination by dust / pollen etc, and if you are struggling with your outer points on these cameras try using a rocket blower or even blower brush to get the dust off your AF module.