Summary: This lens was designed to be used on a crop sensor camera, but I chose to use it on my full frame camera. I'm a big fan of vignetting, so at 10mm, I get the vignetting on the sides. At 13mm there's still a little vignetting at the corners, and then none as you increase the focal length. Of course on a crop sensor camera, vignetting is not a concern. And because it is not an EF-S lens, I am able to use it on both my full frame and crop sensor cameras if I want.
Summary: The zoom range on this is just right for my needs. I shoot a lot in narrow streets in Mazatlan, MX and had a hard time "fitting it all in" before I bought this lens. I mostly shoot at 10mm but the "zoom" to 24mm eliminates changing lenses in many instances. This is my third Tamron lens and I find them all exceptional and don't see how anything could be much better unless it would be an L lens... which I will never have>.
Summary: Many other reviews said it was a nice lens for the money and I totally agree. I use it for taking interior photo of my real estate listings and have been very happy with the quality of the photos even though I need to photoshop many of the photos to straighten out the curvature of the photos. I am happy I bought the lens.
Summary: If you can't afford the high end wide angle lenses, this is something worth settling for. It gets the job done, however it does have soft edges wide open which is a significant downside for a landscape photographer. It has a very good focus system though, with a very loud robotic sound, "I love it" snaps into focus like the terminator about to destroy the scene. Else not a bad buy, but if I rob a bank in the near future I just might upgrade to an f/2.8 wide angle.
Summary: I own this lens for almost two year until I moved on to a Tonkina. At first this is a fun lens to use, but the fun wears out sooner than one would think. Outdoors, in bright sunlight it did well.You have to drag a tripod around for any kind of interior shot and the distortion is seriously weird, as in wavy. Forget handholding this lens indoors without cranking up the ISO. And with a Sony cranking up the ISO means noise, noise, noise. At least it did with my A55.