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Tamron 28-75mm f2.8 XR Di Zoom AF

Review Date: Apr 8, 2006 Recommend? yes | Price paid: Not Indicated | Rating: 9 

Pros: Where to begin? Build more solid than similar-priced lenses from Canon or Sigma, sharper than similarly priced lenses from Canon or Sigma, ideal standard zoom range.
Lack of anything like USM or HSM means no whisper-quiet focusing at, more irritatingly, the need to flick the AF/MF switch for fine focus adjustment.

Talk about value for money! I understand it's probably subject to getting a good sample- as lens purchase always is- but the model I tried today was absolutely phenomenal. Tested on a 1Ds Mk. I, it's f8 matched my 50mm f1.4 for resolution, and at f2.8 it outresolved Canon's 28-105 USM II, 28-135 USM IS, Sigma's 24-60mm f2.8 and Tokina's 28-80mm f2.8 at *every* aperture down to f8. Particularly surprising to me was how much better across the frame this lens was than Canon's own standard zoom, which presented CA and poor edge sharpness even at f8. At f2.8-4, this lens is pretty hard to touch and at middle apertures it is as sharp as any zoom i've ever seen. At sub-300, it has to be the best lens in its category and a considerable bargain. Highly recommended.