I have been using the Tamron on my 450D now for sometime. Quality of build is 3 1/5 out 5, overall use is 4 out of 5 and over all picture quality is 3 1/5 out of 5. Have used the the Canon also, which produced slightly overall better quality picture (4 out of 5) and quality of build is a bit better.


Friends of mine have Tokina and Sigma and they are nowhere as happy as I'm with my Tammy. Price wise (in Aust OZ) the Canon is 40% and Tokina 30% more expensive than the Sigma & Tamron. Good luck choosing the right one. What the heck go for the Canon. LOL