Yes, there appears to be a 0.05 stop loss of brightness in the upper left hand side of the 3rd shot. Man, that's sloppy work...a one stop difference is double, so that's like a 10 percent loss of white, heading towards a tiny bit of light fall-off in the extreme upper left corner of the shot. Gaaaack!!!
What is the point of these pictures? (Product shoot? Stock photos?)
The extremely shallow DOF is a big turn off on these images as is the complete loss of target on the outer edges in image one.
A good use of DOF is attractive however, when the image is at such close range, and is out then in then out of focus it's not very pleasing.
Not a fan...sorry.