Canon and Nikon
T34: Well, so you think this lens will be the equal of a Nikon or Canon 24-70mm f2.8? Guess again! You get what you pay for in Life, Tamron lenses are Junk! For every Ten they make, maybe your lucky enough to get one that's actually sharp, the rest will be soft. Don't waste your money!
Tamron is far from junk. There 28-75 Di is a very sharp lens and one of the best bang for buck lens.