Canon 16-35mm f4.0 IS L
Having relied on the excellent Canon 17-40mm f/4.0 L lens for most of my landscape photography since 2006, I recently upgraded to the superb Canon 16-35mm f/4.0 IS L. Until this lens came along, I had no plans to consider another Canon wide-angle zoom, aside from the dream-worthy TS-E 17mm f/4.0 L and TS-E 24mm f/3.5L II tilt-shifts. But the 16-35mm f/4.0 IS L caught my attention as soon as it was announced, hailed as Canon’s finest ultra-wide zoom to date, boasting superior optics to both the 17-40mm f/4.0 L and even the 16-35mm f/2.8 L II.