Take a closer look inside Canon's impressive EF 200-400mm F4L IS

Canon has posted a video showing its massive EF 200-400mm F4L IS USM Extender 1.4 X reduced to its component parts. The Canon 200-400mm is an impressive lens. This hefty telephoto uses no fewer than 33 elements arranged in 24 groups, including Fluorite and Ultra-Low Dispersion glass, and features a built-in 1.4X teleconverter. Canon's stop-motion video is rather charming, and makes a nice change from the computer-generated exploded imagery that we're used to seeing.  Read our review of the Ca...