Conclusion: A hood (petal style) which mounts on the lens using a bayonet fitting is supplied with the lens. The front of the lens is threaded for 72mm diameter filters and the lens cap is a "center squeeze" design which makes it easier to remove and replace with the lens hood mounted.
Tamron SP AF 17-50mm F/2.8 XR Di II LD ASPH (IF) Lens Review
SLR Lens and Camera Reviews
3 June 2009
Summary: Putting aside such glaring issues as build quality, noisy and slow AF, Tamron SP AF 17-50mm f/2.8 XR Di II LD ASPH IF is capable of producing pretty good results. Unfortunately, the performance is rather inconsistent across the zoom and aperture ranges.
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.
Conclusion: With the exception of the distortion at the wide end, this is a very competent lens and a considerable jump up from the general standard of kit lens that it would replace. There is little else that lets it down and good resolution across the frame that is acceptable even when the lens is used wide...
Pros: Good resolution and control of CA, Nice build, an improvement for Tamron, Consistent through the focal range
Cons: Distortion at the wide end., No supplied case or pouch.
Excerpt: Part 1 - Introduction, Specifications and Autofocus Part II - Distortion and Vignetting Part III - Image Quality Part IV - Macro and DOF vs. Aperture Part V - Conclusions The initial impression of the Tamron SP AF17-50mm F/2.8 XR Di-II LD Aspherical [IF] is that it's a solid lens. It feels "dense".
Excerpt: DSLR photographers looking to move up from the distortion and limited sharpness and speed of their kit lens will welcome this new wide-to-medium tele. Tamron has toted out big-gun technology for its 26-78mm equivalent ($450, street).
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. Overall, it’s a very good option
A Trio Of Tamron Zooms; SP AF17-50mm F/2.8 XR Di II LD Aspherical [IF], AF28-200mm F/3.8-5.6 XR Di Aspherical [IF] Macro, And AF70-300mm F/4-5.6 Di LD Macro 1:2
1 December 2001
Excerpt: Because of the increasing popularity of digital SLR cameras, Tamron has been upgrading their line of lenses to the "Digitally integrated" (Di) standard, employing methods discussed in our Technology sidebar.