I've owned Canon's new 100-400mm L series lens for a few weeks now and thought I'd share my initial impressions of this new addition to my kit. This lens was rumored to be a big improvement over the first version. Those rumors were not exaggerated in my opinion.
Giving the lens a whirl on some sea and shore birds, it performed exceptionally. Focus was quick and accurate and image quality and color reproduction were excellent. Of course the build quality of this lens is nice and solid, typical of Canon's offerings for the professional photographer and dedicated hobbyist.
In short, this is a welcome addition to the David M. Shipper Photography kit. I definitely look forward to having it in the field for nature photography and bird photography. I am sure it will perform equally well for some of my event photography assignments.