Tamron SP AF 17-50mm f/2.8 XR Di II IF Aspherical Review
What Digital Camera
23 January 2009
Summary: This test has proved that the low-cost label so often associated with independent lenses indicates only part of their appeal. Image quality and usability are also strengths and Tamron's 17-50mm f/2.8 also manages to be surprisingly compact. The Tamron is a nice lens all-round – it's just a shame that the focusing ring rotates in AF mode yet seems not to allow manual adjustment for those occasions when the camera fails to focus on the desired plane.
Excerpt: Like Canon's EF-S Lenses , The Tamron 17-50 provides an image circle that is large enough for APS-C (1.5x/1.6x FOVCF) sized digital SLRs sensors. Being sized for a smaller-format sensor allows a smaller design to be used. Measuring 2.9 x 3.2" (74 x 82mm)(d x l) and weighing 15.2 oz (430g), the Tamron 17-50 is an ideal size for these smaller digital SLR bodies. It balances and handles very nicely.
Summary: Outstanding optical performance is spoiled slightly by some increase in fringing at the wide end, but generally this is a very capable and handy optic, with a decent price, especially for Nikon, Canon and Sony users.