L-series super telephoto zoom lens equipped with an Image Stabilizer. The fluorite and Super UD-glass elements largely eliminate secondary spectrum. The floating system also ensures high picture quality at all focal lengths. The Image Stabilizer has two modes and it is compatible with Extenders 1.4x II and 2x II.
The Canon 100-400mm is popular because customers like the following qualities of the Canon 100-400mm: Fast / accurate auto-focus, Fast auto-focus, Rugged, Sharp, Strong construction, Superior build quality, Super-sharp images and Versatile
Most Liked Positive Review
I use primarily for wildlife photography, I love it's speed and zoom. The push-pull is a little different to get used to but easy to get the hang of. The 1.4x III extender works amazing with this lens, however the 2x II extender does not work in auto focus. But I rarely pair them together any way. 400 mm really gets you close to the action. I have used this lens from the deserts of Arizona to the islands of Alaska and it has never disappointed me! It's an incredible lens!!
Most Liked Negative Review
Really wanted to like this lens but too many flaws
I studied many reviews on this lens and waited over a year before finally purchasing it online. This was the first L series lens I've owned, although I had tried others before. I knew the 100-400 has some limitations, but I really thought it would work for me. I usually shoot with a crop format 40D, and wanted this mostly for general wildlife use. Sometimes on a tripod, often not. In my opinion, there are three major problems with the lens when compared with other Canon L series telephoto zoo...View full Review
I studied many reviews on this lens and waited over a year before finally purchasing it online. This was the first L series lens I've owned, although I had tried others before. I knew the 100-400 has some limitations, but I really thought it would work for me. I usually shoot with a crop format 40D, and wanted this mostly for general wildlife use. Sometimes on a tripod, often not. In my opinion, there are three major problems with the lens when compared with other Canon L series telephoto zooms. Firstly the early-generation image stabilization is not particularly effective unless you're in bright sunlight, even when braced. Secondly the focus just isn't quite as fast or as accurate as I would like, with a moderate success rate at best. And thirdly, once I started pixel-peeping I found the image quality of the glass simply isn't sharp enough for me throughout a significant portion of the zoom range at wider f-stops. I'm not sure how many of these issues are generic to the 100-400, or just my copy. Ergonomically I didn't mind the size, weight and bombproof build of the lens, and liked the nice padded bag and sturdy tripod collar. Although the push-pull "dust pump" zoom seemed to function OK, I think overall I really prefer a regular zoom ring. After a few weeks of shooting with this lens, I tried the new Canon 70-300 L at my local camera store and liked it a lot better. It's an excellent lens for about the same price, even though it means losing 100mm at the long end. Virtually any lens involves some compromise, but for the money I feel there are better options than the old 100-400 L. I returned this one.
Reviewed by 306 customers
Great for close ups as well as zooming in on wildlife. Gorgeous optics and easy to use. Push pull zoom is a little cumbersome.
I bought the lens for wild bird photography. I considered the EF 400 5.6, but I thought I better go with IS. I am a pure amateur hobbyist. I like the portability of the lens. The great close focus (5.9') has been useful in getting images of flowers and insects. Most of my use is at the 400mm, but I like the ability to shorten-up if the subject comes closer. I use it mostly from a monopod, and I am still working to get consistently sharp images of moving birds. I have seen the work of professionals who use the same lens, so I know what is possible with my Canon equipment.The EF 100-400mm is heavy! For me, the push-pull zoom feature is an interesting challenge - keep it too loose, and it creeps longer; too tight, and you miss a shot trying to shorten it. I'll keep working with it to see if I can give it 5 Stars.
the lens is a little heavier than I expected, but the auto focus is good. I use it with a T1i. While I would prefer a twist zoom, the slide zoom works OK. I have not tried it yet with a tele converter.
Used this lens at a Canon live learning seminar and it was great, so ordered one from Adorama and they delivered promptly and in great condition. The sharpness of this lens while hand holding it is fantastic. I had a 170-500mm of another brand, but never could get perfectly sharp photos. Very pleased with this lens.
Very nice lens, great images. It's disappointing that it's not weather sealed. It's also disappointing that it won't autofocus on any but 1D-level bodies when using the 1.4x (or 2x) teleconverter. Zoom creep is customer controlled; you can tighten it up if you want, but that makes zooming tighter and harder too. The image stabilization works well but leads to a false sense of security. I got many blurry images when not paying attention to shutter speed. IS is great but it won't eliminate all blur, esp. with very short shutter speeds. But the lens itself is darn nice. Images are sharp with very nice color. I bought mine used and am glad I did. For <$1200 I got a peach of a lens. A real keeper.
I shoot youth Football and Baseball and this lens lives on my camera about 6 months of the year. It's big and heavy but the breadth of range allows for flexibility that I'd otherwise need two bodies for. I actually like the push-pull zoom because it seems faster but it is a disadvantage when shooting through the fence on baseball.
First the lens is big and heavy, but it was expected. My first dislike is the fact that this is a push/pull type lens, does not make for quick focusing. Used it first time in Yosemite National Park, getting used to it. Great optics so far. The next big test is my trip to Grand Teton and Yellowstone National Parks. Ultimate test is trip to Kenya and Tanzania for a safari, the primary purpose of why I purchased the lens.
This is my second purchase of this lens (the first got stolen) so that right there should tell you how much I like this lens. My favorite subject for this lens is Airshows but is a great Nature lens except in the darkest of conditions.
Wildlife, sports and landscraping
I purchased this lens as I needed to give myself a bit more reach than my 70-200 could offer, even with the 1.4 extender. The versatility with the lens is great. The 100-400 range is perfect for photographing airplanes, wildlife, sports, etc. The images are sharp up until about 300mm and then there is a slight drop off in sharpness as you go beyond 300. The focusing at times can be a bit slow, which can be tough if you are trying to lock in on a moving subject. Finally the lens does seem to vignette a lot when mounted to a full frame, which is to be somewhat expected but maybe not so much to the degree I get at times. The lens is push/pull which is a bit uncommon now. However, the adjustment period really isn't bad and after a day of playing around it feels normal. The tension ring is great for allowing you to determine how much or how little force will be required to zoom in or out. I have had this lens for nearly 5 months now and it does seem to be what I utilize the most. I still use my 70-200 f4L IS at times when I know I will not need that extra reach. My 70-200 copy is amazingly sharp and I find it to be a bit faster at focusing. Overall, I do recommend this lens to almost everyone. It is a great versatile lens but does have a few limitations. It will be interesting to see if Canon does come up with something to replace it in the coming years as the current version is coming up on 16 years already. My version was a 2013 build, based on both the serial number and having come with the new center pinch lens cap. The design might be old, but Canon is still actively making them!