« on: February 10, 2013, 05:34:27 AM »
Had the lens from almost a year. Used it very often in a great range of situations (lightning, composition etc.) on two bodies (1DsMk2 and 5DMk3), apertures ranging from 2.8 till... I don't know (16?... 22?) with the AF point almost everywhere, used with MF also in enough situations (last time 30 minutes ago in a big photo report) and I did not see what you're experiencing.
Yes, on 5D3 it needed AFMA. Also, at f/2.8 even if the center is very good the margins are a little bit soft, but this is quite normal for this class (in fact, I found Tokina's sharpness best for it's class). The corners start to catch up immediately from f/3.2 - 4 and become very good at f/5.6. From there on, I don't know anymore...
Just my2c & HTH
Your experience refers quite a bit to the photozone.de findings. After reading this it kept me from going for it. Even though 28 mm on the long end would come very close to my photography preferences in nightsky shooting. 28mm on the long end would yield at least 20 to 22 sec of exposure applying 600 rule (600:28 = exposure before startrails become evident).
Photozone reported, they got a few lemons while testing the copies and that made me hesitate a bit more.
Glad to hear that your experience is good so far. Here's the photozone link.
It is in english and I appreciate their review. Guess I'll go for the classic 16-35 range instead...As it offers the possibilty to mount an ND 10 filter for ultra long daytime exposures as well Cheers, Pedro.