IR> I've searched the archives, but didn't find the answer. IR> I might try to search again.
I will try to look up the messages on my computer, if they are still here. IR> I thought it could be the way you wrote, but Tokina website IR> claims that 28-70/2.8 ATX SV is also in the "PRO" line: IR> http://www.thkphoto.com/products/tokina/index.html IR> http://www.thkphoto.com/products/tokina/afl-03.html They may say what they want, but I have handled both the 2.6-2.8, 2.8 SV (yes, it features "PRO" denomination as well). The 28-80 I have only handled once, and not shot any photos. Simply, there is difference in mechanical construction and materials* once you compare the SV and non-SV versions. SV was previous line of Tokina's consumer lenses, the SV PRO is a merge of the two?!? Optically, I have seen better results from the non-SV versions, esp. at full aperture. That said, it's not a bad lens at all, just not as great as the earlier (and quite a lot more expensive) Tokina 2.6-2.8 or 28-80 probably. *: the zoom rings are plastic in the SV version. Like with most partly plastic lenses like Sigma 70-200/2.8, once you squeeze the zoom ring a bit, it turns much less freely compared to a good all-metal zoom. More of the outer shell is plastic too. The design looks the same, but the materials differ, just hold them in hand :) Hope that helps.
