Excerpt: As a sports shooter, I carry this lens everywhere. It covers from 200mm-560mm( within extender). When I move by plane, I can bring the equipment easily in a jet.This lens is the strongest partner for sports shooter, wildlife and news. You don't loose the chance with it.
Excerpt: I get my chops broken by other parents when I show up with this lens on my 1DX or 1DC at my sons football games but when the parents and coaches see the end result with the shots that I get they soon realize what it takes to make those NFL quality images look awesome!
Pros: Consistent Output, Fast / accurate auto-focus, Strong Construction
Excerpt: Used for sports and wildlife. wish it was lighter. This is everything everyone has said about it. Just marvelous. Seriously thinking of selling my 400 2.8 now that I have this. Need to read the book on some of the features especially vidographers.
Pros: Consistent Output, Fast / accurate auto-focus, Sharp, Strong Construction
Summary: I don't own this lens, but I rented it for a week for a national Swim Meet in Iowa. I typically have used the 70-200 2.8L IS, 100-400L IS, 135 f2 and 1.4x III for most of the meets in the past that I have take pictures at, however those were usually at 25 yd pools, not 50 meter pools.
Excerpt: Primary use is for nature/wildlife photography. Prior to purchase I considered and tested the EF 400 F2.8 and the EF 400 DO F4 lens. The high versatility of the 200mm to 560mm range offered by this lens was the major decision factor in purchasing this lens.
Pros: Consistent Output, Durable, Fast / accurate auto-focus, Nice Bokeh, Strong Construction
Excerpt: I use this lens for all sports, and it is ideal. the zoom gives it great range, especially for football and baseball, and the built-in extender just adds to that. It's easy to operate, with all of the switches being easy to use without looking.
Pros: Consistent Output, Fast / accurate auto-focus, Nice Bokeh
Excerpt: This lens is amazing, delivery quality image as any prime lens, plus the feature that let you work in composition. This lens (200-400 f4) do the job of 200mm,300mm and 400mm primes 2.8mm. The only difference is the aperture (a little more than 1.2mm less of those three).
Pros: Consistent Output, Fast / accurate auto-focus, Lightweight, Strong Construction
Excerpt: Took it out immediately and shot with internal and external Extender(784mm-f13-1/1250-ISO1000-5DMkiii), I figured this should stretch the test. If I wasn't pleased it was going back! I kept it and am thrilled with the performance. The sharpness blew me away!