[u2108453]

Dear, can anyone tell wich one is the best, in terms of image quality only.

Thank you.

[Jeffping]

In my own view, it's depends on your burget! Most of you would know the most expensive among three brand is Tokina, coming is Tamron, and last would be Sigma.
Tokina has a very good reputation among those user. They admired that the surface of lens with matalic feeling is very good and the qulity of picture is relatively high. Secondly, the Tamron I think is worth to purchase if you take the burget in a first pirority and quality in second, I mean the quality is not bad though!