Pros: Ultra sharp image quality.
Aperture is f2.8, it has such a big amount of light that I don't even need a tripod even if weather is bad.
It's waterproof and dust-proof.

Cons: I cannot find any con right now.

Other Thoughts: If you own this you'd better to buy a polarized filter too.

Pros: Wide angle
High Optical Quality
Fast focus

Cons: Price

Other Thoughts: This is a great wide angle lens. If you're looking at L glass you probably already know you're going to pay an arm and a leg but you also probably already know the quality as well. I bought this lens to go wider than my 24-70 and man does this do a great job! Since buying this lens 2 weeks ago I have not once reached for my 24-70 lens for a landscape. This is my go to landscape lens.

I believe another reviewer said it but it's worth repeating - if you put something in the foreground and have a nice sky and nice light you're going to have a great picture every time. If I took the same picture with my 24-70 it would be just an ok picture - this lens stretches everything so it's beautiful.

The only downside is there is some distortion at 16mm when shooting things relatively close, but you're not buying this lens do shoot anything close so it shouldn't be a problem. If you like landscapes just buy this lens - you will not regret it. I thought 24mm would be enough but this has made my landscape dreams come true!

Pros: top notch build quality, great low light performance, very sharp considering it's focal length, perfect for landscapes

Cons: slight clarity drop at 20mm, not good for portraits

Other Thoughts: A lot has been said about this lens and a lot will be said to come. So keep in mind where I'm coming from while you read this. I use a crop sensor camera, primarily commercial portraiture and performance.

Firstly, this is one of the more expensive L series lenses. It's build quality is exactly what you'd expect from Canon.. top of the line. The fixed 2.8 is fantastic for low light shots though I go find that 2.8 on my 16-35 vs 2.8 on my 70-200 is about a 1/3rd stop darker. Not entirely sure why, just something I have noticed in the year I've been using it.

I DO experience the slight drop in clarity around the 20mm mark. That being said, it's only noticeable to me when I'm using this lens for things it's not designed for. This is not the lens you want to shoot portraits with, even at 35mm. It simply isn't flattering to the shape of faces, it's color compression isn't ideal for it, and it isn't tack sharp.

If you are shooting a lot of landscapes however, this is the lens for you. I upgraded from a Ronikon 14mm fixed 2.8 and the difference is night and day. I absolutely adore this lens, but that said, it is exceptionally expensive. For my uses, and given a redo, I would be more likely to save a few bucks and get the 24mm 1.4L.

Pros: Chromatic Aberration is almost nonexistent. Stunning performance. Very sharp. Excellent contrast. Great in low-light. Best wide-angle I've ever owned.

Cons: cost

Other Thoughts: I use it on the 5D Mk II. Use this lens more than any other.

Pros: Don't need to say much - the images from this lens will take care of that. Often people forget that camera is just recording what the lens sees - invest in good glass and every image you take will reward you. We upgraded from the 16-35 L (version I) and i immediately see the difference in sharpness and edge to edge quality. We own many L lenses (2 other v1 16-35 that i wish i could afford to upgrade) and the newer Canon lenses are doing some incredible things with the new sensors. These newer lenses are designed with digital in mind and it shows. We are using on Mark II's & 5D's

Cons: none except i have too work more to pay for it...

Pros: I was looking for a wide angle telephoto lens and considered the 17-40f/4.0L. After reading many review from various sites, I decided on the 16-35f/2.8 L. The clarity in the series II version is outstanding. Colors and sharpness of this lens are it's strength. The speed of the autofocus is noteworthy, as my two other L series lenses [70-200f/2.8L and 24-70f2.8L] are not quite as fast. The outside edges at the 16mm range can be a bit soft improving with every step. Would strongly recommend this lens.

Cons: Sometimes Soft edges at 16mm. The cost is a little high for a production lens.

Other Thoughts: I did not purchase this lens at Newegg as they were out of stock. I waited as long as possible before submitting the local pro camera store.

Pros: This is my second "L" series lens. I have to say, it's the fastest and sharpest lens I own. The focus and zoom rings are super smooth and the pictures come out perfect every time. You will not be disappointed.

Cons: The lens hood does not work all that great. I had a few shots where the sunlight slipped in...

Pros: I needed something wider than stock lens on the XSi kit and decided to go with the higher price one. What an amazing difference in color, clarity and wide-ness! So far very happy with my purchase.

Cons: None

Pros: The EF16-35mm f/2.8L II USM ultra wide angle ZOOM lens captures amazing colors and is a great walk-around lens. I'm very pleased with the image quality I'm getting from this lens. Wide open results are very sharp. This is a very nice size and weight for comfortable, sure handling which makes it a joy to use. Wide angle full frame corners are excellent for a lens this wide. This is a professional lens, very high quality with the “L” designation. It is fully weather sealed to protect against dust and moisture. The Canon EF 16-35mm f/2.8 L II USM Lens is perfect for the wide work outdoor landscape photography, indoor events such as stage work, parties, wedding and for other photojournalism needs.
I spent months researching this lens. I debate between the cheaper 17-40L and the 16-35mm 2.8 II lenses. There is a big difference in price between the lenses. In the end, I felt that having the extra stop of light and wider angle was more important than saving a few dollars. After receiving th

Cons: -None-

Other Thoughts: This is the 4th Canon lens that I own: EF100-400mm F4.5-5.6L IS USM, EF180mm F3.5L Macro USM, EF28-135mm f/3.5-5.6 IS USM and the EF16-35mm f/2.8L II USM.

Pros: Exceptional lens - worth every penny! Sharpness edge to edge, great color, and manageable size.

Cons: None.

Other Thoughts: Best lens I own. Waiting for Newegg to restoct this lens to buy a back-up.