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

Review Date: Aug 6, 2005 Recommend? yes | Price paid: $325.00 | Rating: 9 

Pros: Price, image quality
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I just finished three days of testing this marvelous lens on my D2X. I compared the Tamron directly against the following lenses: Nikon 28/2.8 AFD, Nikon 35/2.0 AFD and Sigma 70-200/2.8 EX HSM (at 70mm). I shot a series of images with all lenses at sub-infinity and 2 meter focus distances and apertures of 2.8, 4, 5.6 and 11. In ALL CASES the Tamron was distinctly sharper in the corners and exhibited almost no CA. All of the other lenses exhibited considerable CA in the corners. Center sharpness was barely better with the Nikon primes (I mean barely) and better than the Sigma wide open but eaqual to the Sigma at f4. The Nikon primes exhibited higher contrast and saturation, but the Tamron performed acceptably well in this regard (easily fixable in PS)... about on par with the Sigma. Frankly I'm stunned. I did expect the other lenses to exhibit more CA, but was shocked to see the Tamron out-perform them in corner sharpness. Obviously the Tamron benefits considerably by being designed for chip imaging as opposed to film. I didn't have to "easter-egg" for a good sample... this was the first lens I purchase and I see no reason to try and find a better sample. I recommend this lens highly.