This company does good work when selling fixed lenses. I think this lens is absolutely awesome. I got this lens to use temporarily on my Rebel Xti. Next year I shall purchase the 5D markII and this lens will go right on it.

When I bought the lens, I must say that I was skeptical. I looked around and the price increased from $400 on average to $407. Then, just before I was ready to buy the lens, it jumped up to $450...imagine my shock. So I looked at a rebuilt because of the lower cost but again, the seller had an impeccable rating which you should be comfortable with. they are good. the lens isn't too heavy either and when zooming, you don't get the the typical lens extending out past the lens body as with most lenses, the lens stays the same length at all times. This is truly a lens designed just for landscape photography in mind but can be used for professional shots of people and other uses. If you move from EF-S lenses, YOU WILL NOTICE A HUGE DIFFERENCE in your picture quality.

Pro:...

It's around US$749.99 in Amazon.com

I had tried this lens first on the 5DMII and thought the IQ was terrific. I then tired it on the 40D and although not as great as on the 5DMII the difference from my non "L" lenses was appreciable. When I purchased my 7D I was hoping this was the kit lens so that I could take advantage of the discounted price, but unfortunately it wasn't part of the package. I payed full price for it and that is my only complaint. The IQ doesn't seem to be as good on the 7D (a cropped sensor) as is on the full frame 5DMII, but is still much better than the 17-55 mm that I used as my everyday lens for the 40D. For the price, I think it could have been better than an f/4.0 -especially for indoor low light situations. It's quiet and focuses quickly. Overall, I think it's a great lens and if you can swallow the price then you won't regret getting it.

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I just got my Canon 100-400mm IS L lens last week. I took it out and gave it a workout yesterday at the Zoo with what may be a once-in-a-lifetime opportunity: shooting baby lions that are rarely seen by the public. Prior to this, I was using a Canon EF 70-200mm f/2.8L IS USM Telephoto Zoom Lens for Canon SLR Cameras with the Canon EF 2X II Extender Telephoto Accessory when I needed more than 200mm. A website reviewer's photos demonstrating how much blur the extender adds convinced me to sink the necessary funds into the 100-400mm lens. And boy, was it worth it! I had struggled with how soft images came out with the extender, even when I used a tripod and a shutter release. But I did all handheld work yesterday with tumbling, rambunctious baby lions in cloudy conditions, and got fantastically sharp, close photographs, even at 400mm.

There are a couple of things people seem to complain about with this lens. First, that it's heavy, and second, the push-pull zoom. I want to address both.

It's around US$1610.00 in Amazon.com

I'm not a professional photographer. This was my first L lens. Over a period of time that I acquired other L lenses (70-200mm f/2.8 IS USM, 15mm Fisheye etc) , I've come to realize this lens isn't anywhere lesser in the leagues as other premium Canon lenses like 70-200L lens.

First the Pros:

1. Once you get used to the push-pull zoom, focusing and zooming onto any object, at any distance becomes a snap.
2. Much has been said of the tightening ring, in my experience it has been a life-saver. With the same hand using the zoom push/pull just a flick of finger can increase or decrease the friction and one can adjust how quickly or slowly zoom push pull works.
3. The picture quality is amazing at least on my camera (50D) I did not notice much difference in picture quality between this and the 70-200mm lenses. Maybe it works differently for full-frame cameras.
4. I was quite skeptical about distortions as noted in some of the reviews. But in actual experience, Photoshop always...

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Short and simple.
I got this camera as a gift, from my uncle who is a pro. Best camera out there! For point and shoot, for family, and other purposes this camera is all you will ever need! Unless you are a pro? This is it!

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This camera was a Christmas present. For three years & across 7 national parks, I have tried to use it. But the low-resolution viewfinder and underpowered LCD backlight make it just about impossible. If youre under a tree or its gloomy, its ok. If its gorgeous and sunny, youre literally shooting blind. Too bad since image quality is good -- but with useless LCD and viewfinder, this camera is a huge disappointment. And its a small thing but the lense cover is constantly falling off. Should have been a great camera -- but fatally flawed.

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A very good camera. It is small enough to take with you and good enough to want to.

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I bought this camera refurbished and have been quite happy with its overall performance. It is similar to the 40D, but with less resolution. It does well when looking at the [...] testing when compared to the Canon XXD series. I have shot roughly 4000 clicks without a hitch. The lack of a sensor cleaner is a drawback. The LCD could be bigger/better, but in the end that doesn't effect what is framed on the wall.

I have owned the XTI and much prefer this camera's feel and handling, but have to say the image quality appears roughly equal. More import is good glass!

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This lens is great for a short thelephoto. For full body shots you need a distance of about 4M so think about it. Otherwise. this lens is a must have.

It's around US$99.95 in Amazon.com

This is a good lens, but not great. The construction and build quality are solid, and the lens feels heavy and sturdy. It has a useful range of 17-85 as well as IS and USM which makes for ideal "walkaround" lens. However, it is not very fast (4-5.6) which limits indoor, lowlight usage. IS certainly effective and useful and will help for lowlight photography, but not for stopping action.

Ultimately though, a lens is only as good as the photos it produces. Unfortunately, this lens (or perhaps my copy of it?) disappoints in that area. Comparing shots, the kit 17-55mm IS lens actually took sharper photos than this! I still have this lens with me, but more often than not I have been disappointed with the sharpness, especially in my landscape shots (even at higher f/8-10). Barrel distortion is also fairly obvious, even to the untrained eye. Buildings, towers and other tall structures will look concaved. This is less prevalent for smaller, shorter objects, but nonetheless there. Vignetting is not present...

It's around US$449.95 in Amazon.com