Another unique f/4 zoom option: Long telephotos. Canon’s newly announced EF 200–400mm f/4L IS USM, with its built-in 1.4X converter, joins its Nikon counterpart, the 200–400mm f/4G AF-S Zoom-Nikkor ED VR II. Streeting for $11,799 and $6,750, respectively, these can be called “favorably priced” only when you figure in the number of lenses they replace. Nevertheless, had either of these sports-perfect zooms been produced in f/2.8 versions, the resulting bulk and greater expense would have put them out of reach of many photographers (witness Sigma’s $26,000, 34.5-pound 200–500mm f/2.8 APO EX DG IF). We often see these f/4 tele zooms along the sidelines, by the way, and they’re usually handheld.