This weekend I hired the fantastic 24-70mm F2.8 L Mk ii lens after my trusty 24-105mm F4 lens finally died last week.
Anyway, this evening I got the chance to run a very bried test to compare it against my 70-200mm F2.8 L IS (Mk i) lens and my Sigma 50mm F1.4 lens, with everything shot at F2.8. I only checked centre sharpness in this test, but having used it to shoot a wedding yesterday I am mighty impressed.
Comparison images are on my blog and there is no question the 24-70mm Mk ii wins hands down! Now to find a means to purchase a copy of this lens... although I would happily do with the 135mm F2 first I think!
Link to write-up and comparison pictures:http://www.bellissimaphoto.co.uk/photographers/canon-24-70mm-f2-8-l-mk-ii-review.html