Excerpt: I bought this as an upgrade to my 18-55 kit lens that came with my T1i. I planned on using as my everyday lens. The first thing I noticed about this is that it is much heavier than my Canon kit lens...probably a good thing (better quality), but taking a bit to get used to. In the short time I have had it, I have noticed an improvement in sharpness over the other lens, but haven't done any straight comparison shots.
Pros: Easily Interchangeable, Fast / accurate auto-focus
Excerpt: Use as daily lens started getting error code 99 communication wrote Tamron 8 Aug got email 11 Aug tosend them lens they adjusted Aperture Assy got it back 20 Aug it works great now produces really sharp photo.
Pros: Consistent Output, Easily Interchangeable, Fast / accurate auto-focus, Strong Construction
Excerpt: I needed a lens for doing indoor photography at a work conference. The 2.8 worked nicely and I also used my external flash I was very pleased with the photos it took and the cost of the lens made it even better!
Pros: Durable, Easily Interchangeable, Fast / accurate auto-focus, Lightweight
I really really wanted this lens to work for me...
6 March 2014
Summary: I really really wanted this lens to work for me because its affordable but unfortunately it didn't. Don't get me wrong, I love the constant 2.8 but it can only focus in bright sunlight. Indoors, in relatively 'normal' lighting, it just can't focus. It keeps hunting and cannot lock focus so you have to manually focus. I used it mostly for video and if you're always manually focusing, its a keeper.