My daughter, a film major, bought the Tamron SP AF 10-24mm F/3.5-4.5 Di II last May and loved it, especially when she used it for 10 weeks as the videographer for summer camp. The movies we saw came out amazing--crisp and sharp. Doing a lot of running and gunning (she now has a much better stabalizer than she did last year), this lens is perfect for getting close up with lots of kids in the shot.
Unfortunately this year, about 2 weeks into the summer camp, she texted that her lens was acting up--when she zoomed completely in or out, the aperture setting would go to "zero" and wouldn't allow her to manually change it at all--it wouldn't even show any numbers!
We're a Canon family, with my biggest lens being a white lens 100-300 mm, and we've had zero issues with lenses malfunctioning so we didn't get the "protection plan" from the store we purchased this lens at. Tamron has 6 year warranties but we have to ship the lens in to Tamron, so shipping, fixing, turn around time...how long will all that take? Probably the rest of the summer camp, which is totally unworkable.
She paid $500 for this lens, and we didn't expect it to go out on her after 1 year of use. She's in the middle of a 10-week shooting gig, making a new movie every night to show the campers on Sat night, and then starts a new movie the next day, so there is no downtime from her 12-hr days of shooting and editing. Does Tamron have some kind of loaner program while she has to wait for her lens to get fixed??? No bueno...maybe we should've stuck with Canon after all....;-(((