Which would be a better choice? I bought the Tamron for my XT, friend wants to get a cheap 17-50 2.8 for his d300. I know that when I looked I came to the conclusion that the Tamron was better, but ...

EF-S 17-55 F2.8 IS USM: $700<BR>Condition - near mint condition. Comes with original front & rear caps & 3rd pt lens hood (not made by Canon). <BR><BR>EF-S 17-85 F4-5.6 IS USM: $300<BR>Condition - ...

The Sigma 18-50mm F2.8 DC DN Contemporary ($599) should appeal to photographers using APS-C sensor cameras. It's the slimmest, lightest F2.8 zoom, while its bright, close-focusing optics offer real ...

The 18-50mm lives up to its small-and-light billing. It measures 2.9 by 2.6 inches (HD) and weighs just 10.2 ounces. It's lighter and smaller than its closest competitor, the Tamron 17-70mm F2.8 (4.7 ...