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.
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!!
November 20, 2011
Back to the 100-400L
Purchased with a 1.4 teleconverter and have just started looking at the lens sharpness.
I have started using this lens with a full frame 6d and the images are very sharp and the focus is very accurate. The 1.4xIII converter does not appear to detract measurably from the sharpness of the lens at 400mm, very impressive so far.
The lens feel and tightness of the zoom mechanism is much improved.
August 1, 2013
Fills my needs
I use this lens for night high school football games. It is very sharp action pictures.
July 16, 2013
I have owned this lens for about 2 years. It is primarily used for Wildlife and Sports photography. I had read all of the negative reviews before I purchased the lens, and have concluded that there are a lot of people out there that really don't have a clue about lens choice and lighting conditions. No, a 4.5 F lens is not considered a "low light" lens, so don't try to use it as one and then complain about the picture quality. Use this lens for the awesome piece of equipment that it is, and it will not let you down. It has a very fast focus and is built like a tank. If you are considering the purchase of this lens, just go and do it. You will be very happy with it if you know anything at all about photography.
June 22, 2013