17-40mm is an older style lens, superseded by 16-35 f/2.8, faster, bigger, heavier, bigger filter size and more than twice the price.

very good quality, reasonable price

If you're looking for a reasonably priced, wide angle Canon L Series lens, you should strongly consider the 17/40 L.

As there is quite a bit of difference in build quality as well as price range, that should come as no surprise

I give this lens 5/5 stars, simply due to its extremely affordable price (for an L lens) and excellent performance

but the price is right for an L lens.

Considering the fairly modest asking price, unless you really need a faster aperture ultra wide angle this really is a good deal for what you get a pro grade lens that doesn't cost a fortune, not perfect (maybe not as sharp as some would like from an L lens) but still very good.

A really superb wide angle zoom, that "feels right" in your hand, at a reasonable price.

Great lens at a great price.

I got this lens for my full-frame camera (5D), and it's a great lens to get into wide angle photography - sharp and versatile, plus it's very nicely priced for an L lens.

I would recommend this lens especially at half the price of the 16-35mm f/4.

I would like the extra 1mm of the 16-35 but not at double the price

Great product and great price for L lens.

For a cheap price you're getting a lens that can withstand a drop from about 5 and half feet and still be good

Great lens and a super price

Great lens at the reasonable price.

I give the 17-40 5 stars, it performs well for it's intended purpose at an affordable price, and has met all my expectations from the description and reviews

WORTH ITS PRICE!!!

Great lens , great price.

I read many reviews and shopped around for the best price

the only drawback is the price, but i feel it is well worth it

All in all, this is a great lens for some one who wants to jump in to the L series, extremely reasonable price for the quality delivered.

Wow, what an addition to my lenses and at an affordable price

not much to add to other reviewers comments both technical and descriptivelens is smooth and solidly built as all L lensyou do need to add on a filter to complete water resistanceas well as protect lens against dust and finger printsvery fast smooth focuscanon quality at affordable price for amateur and pro

The price is unbeatable for an L-class lens.2

In the future I plan on paring this lens with a 70-200 f4 L which I understand is one of the best priced and best value canon lenses made.

Primes are absolutely fantastic values, reasonably priced, fast, and inconspicuous, BUT offer limited flexibility which, in my mind overrides the other factors

My favorite moderately-priced two-lens kit with my full-frame 5D II combines this (or the 16-35/2.8) and a 100/2

Excellent quality and very good price

If you need super fast and sharp I would go with a prime or maybe 16-35mm