Tamron's SP AF17-50mm f/2.8 XR Di II VC lens is designed exclusively for cameras with APS-C sized sensors and covers the popular standard zoom range of focal lengths. On Nikon cameras it is equivalent to 26-78mm in 35mm format, while on the Canon EOS 40D body we used for our tests, the equivalent...

Most of the alphabet seems to feature at some point in the Tamron's full title, but these abbreviations promise plenty of features. SP signifies Super-Performance, based on three XR (Extra-Refractive) elements, an LD (Low-Dispersion) element and two Aspherical elements in its construction.

The Tamron AF 17-50mm f 2.8 XR Di II is a lens designed specifically for digital SLRs and their smal

Moderate pricing for a fast lens.

Loose manual focus ring

I wanted to provide some detail about my experiences with this new lens, and it's performance in my day to day photography work. If you had asked me 15 years ago, I would have been very hard pressed to recommend a Tamron Lens, but with some work and time, they have managed to sell me on this...

Solid Construction: OK, we hear a lot about "plastic" feel and less than rugged construction; I think we will have to get used to this construction method as it will be the norm going forward.

Auto Focus Lock: OK here is where I will complain about Tamron's way of doing things; On other AF lenses that I have from Nikon, you can turn the Auto-Focus Ring, while the lens is set to Auto and it freely turns without causing any potential damage to the lens.

My first lens upgrade from the kit one I got for my Nikon. I really like it, its strong, works well and big improvement in the pictures. No complaints from me at all.

Durable; Rugged

This lens offered me the best bang for the buck as I am starting to do Weddings and events. I need a fast lens for low light venues and this lens does a great job. I have it paired with a Canon 7D and it has given me some clean crisp shots.

The kit lenses you get with digital SLRs aren't generally that good. They might be sharp enough, but their specifications and handling leave something to be desired. The Tamron 17-50mm f2.8 could be the answer, offering a significant step up in features, versatility and, perhaps, performance.

Yes, I would recommend this to a friend

Easy To Use

Loud motor

I wanted a general purpose zoom lens for my Canon Eos XSi and after reading extensive reviews of various lenses I decided to try the Tamron to save a little money over the equivalent Canon lens.

Easily Interchangeable

Blurry Focus

Tamron's 17-50mm F/2.8 lens is a good upgrade if you own an entry-level or middle-of-the-pack camera, as it can provide a noticeable jump in image quality, as well as better performance when shooting in dim lighting conditions.

F/2.8 aperture; Good upgrade for entry- and mid-level camera bodies

A little bit pricey