The aplomado falcon (controlled subject) is small and extremely fast. Lepp used the EOS-1D X Mark II’s autofocus “Case 3” to bring the bird into focus at the moment he got it in the frame with all 61 AF sensors active. ISO 6400 enabled a capture of 1/3000 sec. at f/16 with the Canon EF 100-400mm f/4.5-5.6L IS II USM at 400mm, handheld.Some might think that because I’m a Canon Explorer of Light, I’ve always got a full stable of Canon’s latest, greatest cameras and lenses. In fact, I’ve got to make the same hard choices you do about photographic equipment purchases, and any upgrade has to be worth the cost in terms of advancing the capability and quality of my work. In landscape applications, I’ve looked for high-resolution, full-frame sensors and found my most recent dream machine in the 50-megapixel EOS 5DS R. But for action—be it flying birds, pronging antelope, or humans engaging in outdoor recreation—I need speed, and Canon’s new EOS-1D X Mark II delivers. When I talk about a camer..