Canon EF 70-200mm f/2.8L IS III USM

Stand in the photo pit at an NFL game and look back at the row of shooters. The wall of white barrels is mostly this lens, or one of the two versions that came before it. Canon paints its L-series telephotos white to keep them from baking in the sun, and the 70-200mm f/2.8 is the lens that made that color a status symbol. It is one of the most heavily rented telephoto zooms in working photography and a staple in nearly every wedding kit.

The Mark III, announced in 2018, is an honest story: optically it is the Mark II. Same glass, same internal zoom, same 1.2 meter close focus. What Canon changed was the coating. The new Air Sphere Coating knocks down the veiling flare and ghosting the older versions threw when you shot into a stage light or a low sun, and the front and rear elements got fluorine to shed water and fingerprints. If you already owned the II, the III was not worth the trade. Buying fresh, it was the better lens for the same money.

What it renders: sharp wide open across the whole range, which is the entire point of a constant f/2.8 zoom that costs two grand. Stop to f/4 and the corners snap in. The bokeh at 200mm f/2.8 is what sells it, smooth and round, a background falling away behind a face on the far side of a reception hall. Contrast runs high and color is the warm, faintly saturated Canon L look. The stabilizer buys several stops handheld, which is what saves you at 200mm in a dim church.

The honest weakness is timing and heft. Canon launched the EOS R mirrorless system the same year as this lens, and the RF 70-200 f/2.8 that followed is far shorter and lighter. This EF version is a 1,480 gram brick by comparison, arriving just as the mount it lives on began its slow sunset. On a DSLR it is still superb. As a long-term bet in 2018 it was already facing the wrong direction.

People still buy it, used and new. The EF body market is huge and the optics are genuinely excellent. Cross-shoppers weigh the Sigma 70-200 Sport and the Tamron G2 at lower prices, and both are good, but Canon's USM autofocus on a Canon body is faster and more certain in the moments that pay the bills. One practical note: the constant f/2.8 means your meter reading holds as you rack from 70 to 200, so you can set exposure in Zone Light Meter at one end and zoom freely without the aperture drifting. The 77mm thread takes standard pro filters when you want an ND for video pulls.