Originally Posted by DonSchap
No, the "size" is the aperture setting on the lens. You can see that the minimum size goes up as the focal length gets longer. The chart indicates quality of image in an inch-by-inch format.
haha, I'm retarded, I was thinking about that after I posted and didn't want to dig it up. dunno what I was thinking. I browse lens reviews all the time (photozone charts) :D