Canon EF 100-400mm f/4.5-5.6L IS USM

My wildlife/Racing Lens. Not a big fan of pull zoom, IS is rather out-dated, only being 2 stops.Even with the mentioned negatives, its still much sharper then both Sigma 150-500 and Sigma 50-500. USM is quick to focus and quiet too. Can be used handhold, just be careful with IS, only being 2 stops, there are newer lenses with better IS. On certain cameras can be used with 3rd party extenders (with tape trick) and still focus. Overall good lens that really really should be updated.

Sure, it's not the sharpest zoom in the bag - but it's darn close. I love the flexibility and range of this lens, and the pictures I can produce with it. In bright sun, this thing is hands-down the best zoom I ever put in my bag. OK, the best long zoom. Love the push-pull, love the IS, love the quick AF. Really, there's not much NOT to love about the thing. I've loved it enough to buy (and sell) it three times.

We've owned this lens for 4 years now and it's fantastic. The first photo shoot with it earned an award. On the Canon 7D this lens is impossible to beat for taking shots of Eagles or Grizzlies alike. For airshows there is no better lens. The push pull design takes a bit to get used to but it sure makes focusing on fast moving aircraft easy. I guess that's why it's called "The Airshow Lens" I wouldn't use it for portraits but that isn't what this was made for. Problems: This is a big lens with ...

The most versatile wildlife lens for a Canon user. My copy is pretty sharp but I have to step down a bit, AF is so-so in poor light but as a go anywhere wildlife lens it really can't be beat. The IS is a little old design-wise but is still effective, for birds it is possible to get sharp shots handheld at 1/250 or lower. For BIF shots it is pretty good but the AF on the 400 f5.6L prime is supposed to be better. I've never had any problems with dust in the camera body but there is some ...

I have owned this lens for 5 years now what a great lens ,from the rebel XT to the 7D my pictures are super sharp and very little aberration F5.6 has a little MTF but F7.1 is deadly .If you use the old Tamron 1.4x teleconverter (1.4x C-AF1 MC4) only, you will have auto focus and IS and you won't harm your lens,this will give you 896mm on the APS C sensor. Problems: Push pull zoom will bring in dust to the camera get a good UV filter B+W

I have owned this lens for 5 years now what a great lens ,from the rebel XT to the 7D my pictures are super sharp and very little aberration F5.6 has a little MTF but F7.1 is deadly .If you use the old Tamron 1.4x teleconverter (1.4x C-AF1 MC4) only, you will have auto focus and IS and you won't harm your lens,this will give you 896mm on the APS C sensor. Problems: Sucks dust into the camera do to the push pull zoom get a good UV filter for this lens B+W.....