Canon EF 17-40mm f/4L USM Ultra Wide Angle Zoom Lens for Canon SLR Cameras

No plastic grinding against plastic when you focus this thing. Feels just like my Fujinon lens I use on my TV news camera. Pro gear. Want some? Pay up.

I bought this with my Canon 30D. This is a great lens and L series is the best. I have mostly L lens because the quality is worth the money.

This is a good lens, but it's certainly not great. Along with all other L-series lenses, it's more durable, weather resistant, doesn't rotate the front element. It has a virtually silent focusing motor which is a pleasure to use. The lens is light, feels solid.

But as far as quality is concerned, it's average. On a full-frame camera, such as the 1Ds or the 5D, the corners are much sharper than that of a 28-135, for example. But on a cropped-sensor camera such as the 40D or the XTi, you will not see almost any difference in quality between this and the 18-55mm kit lens. I've tried, you just can't. If you're trying to stay on a budget, look into the cheaper EF-S, Sigma or Tokina alternatives.

this lightweight little wonder is always on my camera, i really hardly ever take it off...i do however, find the hood a bit...much, that being said the feel and operation is obviously that of an 'L' lense

I bought this product for my sons graduation. He absolutely loves it!! He had wanted it for a long time and he said it was worth waiting for. Thanks for the great service also.