one can use the canon software included with the camera and use the peripheral illumination feature to correct that(Not a killing problem to this product, just bcz of the

I worry that this problem will resurface after the warranty has expired

one can use the canon software included with the camera and use the peripheral illumination feature to correct that(Not a killing problem to this product, just bcz of the

For most use, distortion isn't a problem save for architectural photography

But, the worst problem is it has server chromatic aberration

Few problems at the other focal length as these issues are nowhere near as obvious

Good quality glass and one of the least expensive L lenses you can buy.

In the world of lenses i think you really get what you pay for,even though this is a cheaper L series it still delivers the goods

It's one of the less expensive "L" lenses, making it a relative bargain.

It's one of the cheapest L

Like all L lenses you do get an included lens hoodA quick hit summary of the stronger and weaker points of the lensPros:+ Excellent build in line with the L badge top quality construction and sealing the lens is robust and built to last+ Pretty good sharpness esp in the central area, but really needs stopping down full at the 17mm mark (about f11) to tighten the corners up at f8 the extreme corners will have some softening (APS-C users won't see this at all as it's cropped out) very good at f4

It makes a good first L-lens, and a staple in the arsenal.

First off, if you're a pro with a bag full of $2000 lenses, you're probably not interested in this, the 2nd least expensive "L" lens

And if you have money to burn, definitely look at the more expensive L lenses.

The 17-40 L on the other hand is just amazing

f/2.8 L - extremely fast, extremely sharp

This like, what, the second cheapest L lens available

The price makes it one of the cheaper L lenses on the market today, but it doesn't sacrifice build quality, or image quality

The construction s typical L - great

For an L-series lens, I'm surprised that this lens isn't sharper, but it's also one of the least expensive L-series lenses

Overall, you are paying ~40% less than any other L lense and let's face it, that L is worth a lot

Great L lens for the Canon's line of ultra wide angle zoom lens

I already knew what was going on long before buying this lens, this is still a great L lens what will be with me when I do get around to purchasing a full frame camera.

Looks like all my lenses will be L from now on.

Final summary: This is not a fantastic lens but still a legendary "L" and is worth the price

This like, what, the second cheapest L lens available

But for instance the regular EF 28-135 non-L is sharper at 28-40 than this lens is.

Not bad for the cheapest L lens.

I normally prefer the 17-40 F/4 L over the 24-70 on the 5D Mark II unless I am shooting

And since its Canon's cheapest "L" lens, you really can't go wrong on the price either

Well, I only own one other L, the 100-400mm f/4-5.6, which I love - but I was still rather disappointed in this one

The build quality is worse than L-series but still pretty good

It then becomes a standard zoom with the 1.6 crop factor and is a great first L lens because of its price

Not really, I expected some issues regarding glass simply because it's a very inexpensive 'L' series.

As one would expect from L-series glass, clear with good contrast and color

Of course, it is not the best l lens it obviously has aberrations, fringing, slightly soft corners and

I'm just glad Canon made a somewhat affordable L lens for us amateurs who want to save up for a nice piece of equipment.