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Tamron 17-50mm F/2.8 XR Di II LD Aspherical [IF]

1750diII
Review Date: Aug 17, 2008 Recommend? no | Price paid: Not Indicated | Rating: 4 

Pros: Small, good construction
Cons:
Image quality is on average side (about half of pictures is blur)

Purchased online from Dell store. Testing in real life brought very unsatisfied results more than 50% of pictures were out of focus, the remaining still were worse than made by Canon 10-22mm lens (at 17mm). I had to send it to Tamron USA for repair. However, nothing changed after I received it back!
In lab testing (with tripod) the lens showed much better results sharp in center at any aperture, corner improves gradually at f.4-5.6-8. Is compatible with Canon EF-S10-22mm (at 17mm) and better than Canon EF 28-105/3.5-4.5 (at 50mm).
Very controversial results, so I can not consider it as a stable lens. For my opinion a price for this lens is a bit higher.
Autofocus is fast enough and the motor sound does not bother me.
Camera: Canon EOS350D