7D + 70-200 2.8 IS: front focusing, right?

If you magnify the image, you'll note that the leaves in front of the squirrel are in focus. Agree?

Here I used the "normal" AF point, not a "spot" AF. May be the normal AF point actually focuses in a wider area than the actual rectangle, and so it locks onto the leaves which are closer than the squirrel.

Any thoughts?

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Use a chart. this is not the way to adjust focus

http://focustestchart.​com/chart.html

cfibanez wrote in post #8866892
Any thoughts?

What you see is exactly the same thing as fooled me the first day. Even if the AF points are drawn pretty big in the viewfinder, they are even bigger in reality, and not just a little.
In spite of this camera being filled with accelerometers, it doesn't remove the bottom AF point from the selection when using automatic AF point selection either, so if you do that, for some reason, and think it works like it used to do (40D, 1D Mark III), you are in for a surprise.
Here you selected one point, and it would probably have been better with the spot AF version.

I agree. You needed to perform more controlled tests to determine whether the lens is front focusing or not...

Thanks for all the comments. Indeed, focus tests need to and will be conducted. (So far a focus test chart has suggested +5 adjustment for this lens, but the moire test indicated that a -4 was needed!). Anyway, my point was more about your experience with the normal AF points in the 7D viewfinder on a slanted surface, such as the ground shown above. If the sensor lines in the AF system run considerably outside of the rectangle you see in the VF, then chances are the camera will front focus no matter how well your lens is calibrated. I want to know whether other 7D users have had this issue. It seems like Anders above has had similar thoughts, and I am very grateful for his input. Any other one?

Not only similar thoughts, but similar experience.

Of course, it could as easily end up as back focus if the part of the sensor extending above the top of the focus box picked up on something with higher contrast there.

Yes, but slanted areas towards the camera are much more common near the bottom of the image (ground) than at the top (ceiling?).

apersson850 wrote in post #8873852
Yes, but slanted areas towards the camera are much more common near the bottom of the image (ground) than at the top (ceiling?).

I was thinking about the slant across the bottom/top of a single focus sensor, not the whole image.

stsva wrote in post #8873952
I was thinking about the slant across the bottom/top of a single focus sensor, not the whole image.

A sensor line will always lock onto the closest region in the image that intersects it. Hence always front (and not back) focusing.

cfibanez wrote in post #8874142
A sensor line will always lock onto the closest region in the image that intersects it. Hence always front (and not back) focusing.

I'm not sure that would be the case if there were a high-contrast region at the top of the sensor and the closer area at the bottom were low-contrast.