The Tamron SP AF 17-50mm f/2.8 Di II VC is a standard zoom lens designed for primary shooting duties. The lens aims to stand out for its f/2.8 designation, which is a fast, open aperture designed for low light shooting.

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

This is the perfect lens for an upgrade from the kit lens. You'll be surprised at how much it increases the quality of your photos. I definitely recommend it as a staple lens for any photographer.

"I've been borrowing my friend's TAMRON 17-50 (VC model) frequently over the past year and its great for what I do with my T3i. I do photography at a camp and this lens is super fast and sharp especially for the application.

The product is great because it has a very wide aperture for a zoom lens, without breaking the budget! It's also a constant f/2.8, so you have great aperture even when fully zoomed in.

Perfect for large aperture.

Easily Interchangeable; Fast / accurate auto-focus; Strong Construction

Heavy

I am a Sports Photographer and I got this lens to go on my backup camera, Canon 7D. I used to have just a kit lens but with this lens things are so much better. I would recommend this lens to anyone shooting a cropped sensor.

I am verry pleased with this amazing lens ! It's a bit big and heavy, but I was suprised with the quality and the sharpness of the pictures ! I would highly recommend !

I've owned several copies of this lens. Initially, I used it on a Nikon D40 as a lightweight travel lens. I moved on to a D200, D300, and D7000. It performed best on the D7000. However, I moved to a full frame camera (D700) and sold my last copy.

Sharpness; weight

Focusing speed isn't extremely fast; but it hasn't been a problem.

After a couple of months I started having issues with this lense. It would not focuss. Sometimes i have to press the shooting button several times before i can take the picture. I am very unhappy with this lense. I recomend you not to buy it. Moreover. Dust comes into the lense.