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
My favorite lens of all
I carry two 5dMkIII camera bodies on my Cotton carrier and this lens is always chest mounted. I love this lens. It's a great portrait lens and at 400 mm will take portraits from across the square. I wish it was faster than f/4.0 but if it was bigger it would be a pain to tote around and hold. It's fast focusing, doesn't hunt much, and gives very sharp images at wide open. Just remember to use 1/400 sec or faster (I use 1/500 or 1/640) to avoid blur. I almost never use tripod. I even got great shots of Musk ox from a rubber zodiak in Greenland. Has two focal distance settings--remember to use the right one to avoid hunting.
January 10, 2014
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