Canisdirus wrote:
I agree to an extent, but FPS is well ... FPS. Nothing to measure.
AF is different, but honestly, who decides on a millisecond difference?
For most folks, knowing it is Gear driven, SSM or SSMII is enough.
I've watched a TON of you tubes on lenses, and literally, no one bothers to put a stopwatch to AF.
It's enough to know the AF is either okay, fast, or ... really fast.
Actually a lot of reviewers do measure the fps. And there is something to measure; the number of frames per second. On the other hand my comment centered on focus acquisition when taking a photo which is measured by the resulting photo of a moving object being in focus in the final image. Which, by the way, is pretty much all that matters in the end. Is my photo in sufficient focus for my needs? DxO does not help with that. Their process assumes focus while in the bulk of real world photography focus is the one thing you need to be able to rely on. Most of the aberrations measured by DxO are fixable in post. So, while DxO provides some comparable information that might help you make a decision in the rare instance that two lenses acquire focus equally well, you still need to know the ability of a lens to focus well before that point and in most cases the focusing ability of the lens will have already determined your choice. Unless you limit yourself to studio, lab, landscape and a little outdoor portrait photography.