About three years ago we picked up a Tamron 28-75 2.8 to have a nice mid-range zoom on our crop bodies and we liked that it could be a wider option on our 5D.
The lens has been rock solid and tack sharp ever since we purchased it. A few weddings ago, it began to behave oddly and then wouldn't auto-focus at all. We called Tamron and shipped it back to them. They replaced the "Aperture Assembly" and returned it to us absolutely free of charge.
Every now and then it is nice to deal with a company with a warrantly longer than Canon's one year standard!
Kudos to Tamron.


