On the Canon side of the house (sorry Nikon shooters) what is the best lens for wildlife photography? That’s always a loaded question because EVERYONE has their own thoughts on the matter. That being said, then, this is my opinion (shared by many but certainly not by everyone). It is the Canon EF 400mm f/5.6L USM Super Telephoto Lens. This lens has been in circulation for a long time and is still in production (and that should tell you something right there). On a full-frame camera like the 5D Mark III it shoots at 400mm, but on a crop-sensor camera like the 7D Mark II its effective focal length is a whopping 640mm. This is a pretty good short review of its strengths and perceived weaknesses (but I think the reviewer does a pretty good job of discounting the weaknesses and I totally agree with his assessment). To see my other posts about this lens just enter 400mm lens in the search box. Here are some photos I took in the Galapagos Islands of Ecuador (November 2015) using this lens (click on images to enlarge).