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

Wide open at f/2.8, this lens already resolves like most zooms only manage stopped down two clicks. That was the headline when Canon shipped the Mark II in 2010, and it held up. The version it replaced was soft in the corners at 200mm and lost contrast by the long end; the II fixed both with a recomputed optical group and a fluorite element, and the result was a 70-200 you could shoot at maximum aperture without apologizing for it. Sharpness barely improves when you stop down to f/4, which tells you how little there was to fix.

The rendering fingerprint is clean, neutral, slightly cool color with high microcontrast and bokeh that goes smooth and round thanks to a circular aperture. Out-of-focus highlights stay disks rather than collapsing into nervous edges, and the transition from the focus plane to the background falls off gradually instead of snapping. This is not a character lens. It does not swirl or glow or give you anything quirky. It gives you the subject, sharp and separated, and gets out of the way. Flare resistance is strong even backlit, the coatings handle a sun in the frame better than most zooms of its era.

This is the white lens you see on every sideline and in every wedding party. Sports shooters live on the focal range and the f/2.8 constant aperture; portrait and event photographers use 135mm and 200mm at f/2.8 for the compression and the background melt. The four-stop image stabilizer (the IS in the name) buys you handholdable frames at shutter speeds where a non-stabilized 200mm would smear, which matters in dim receptions and indoor arenas. Autofocus from the ring USM is fast and near silent, and it tracks moving subjects reliably.

The honest weakness is the weight and the size. This is a 1.49kg block of glass that fronts a 77mm filter, and a day of handholding it tells in your forearms. It also vignettes noticeably at 200mm wide open, about a stop and a half in the corners, which you either correct in post or use as a feature on portraits. Some photographers cross-shop the f/4L IS version for half the weight and accept the slower aperture, and that is a genuine tradeoff rather than a downgrade.

Where it sits today: this was the professional telephoto zoom for the back half of the 2010s, and on the used market it stays expensive because it earned its reputation honestly. The Mark III that followed is barely different optically, so a clean II is the value buy. If you shoot it on film through an EF body, meter wide open in low light and trust the f/2.8 reading; the constant maximum aperture means your exposure does not drift as you zoom from 70 to 200, so a single incident or spot reading in Zone Light Meter holds across the whole range. The 77mm thread is the standard pro filter size, so your ND and polarizer stack shares with the rest of an L kit.