Canon L EF 70-300mm f/4-5.6 IS II USM

The autofocus on this lens is in the 94th percentile, making it one of the fastest-focusing telephoto zooms we've tested. The 4-stop stabilizer is also a standout, letting you get sharp shots handheld at 300mm. It's a top pick for wildlife and sports shooters on a budget, as long as you can live with the plasticky build and poor macro performance.

The NANO USM motor is the real star here. It's a hybrid system that gives you the speed of a ring-type USM for stills and the smooth, quiet operation of a stepping motor for video. In our database, this puts its AF performance near the very top, making it a standout for tracking moving subjects. Optically, it's solidly in the 81st percentile, which is impressive for a consumer zoom. The single Ultra Low Dispersion element does its job keeping fringing in check, and the 8-blade diaphragm produces decent, if not spectacular, bokeh. Sharpness is good throughout the range, though you'll see it soften just a touch as you approach 300mm, which is typical for this class of lens. The 4-stop Image Stabilizer is a lifesaver, letting you shoot at much slower shutter speeds than you'd expect for a 1050g lens.

Stacked against the superzoom competition, the Canon holds its own by specializing. The Sigma 16-300mm and Tamron 18-300mm offer wider starting points and more range, but they're designed for APS-C sensors and can't match the Canon's full-frame AF speed, which is in a different league. The Nikon Z 28-400mm gives you even more reach, but its f/8 aperture at the long end is a full stop slower, making the Canon's f/5.6 feel almost bright by comparison. If you're on a Canon full-frame body and prioritize fast, accurate focusing for action, this lens is the clear choice among these, even if its build quality feels a bit plasticky next to the more premium options.

Pricing on this lens is all over the map, with a wild $1203 spread across vendors from $387 to $1590. If you can snag it at the lower end of that range, it's an absolute steal for the autofocus and stabilization performance you're getting. At the higher end, you're creeping into used L-series territory, which makes it a tougher sell. The sweet spot seems to be finding a clean used or international version copy for well under $500. For a lens that scores a 90.7 for wildlife and sports, that's a lot of reach for the money.

The Canon EF 70-300mm f/4-5.6 IS II USM is a telephoto zoom that punches well above its weight class in a few key areas. Its autofocus system lands in the 94th percentile of all lenses we've tested, which means it's seriously snappy and accurate. Pair that with stabilization that's good for about 4 stops, and you've got a lens that makes handheld shooting at 300mm feel surprisingly easy. It's not the brightest lens out there with a max aperture of f/5.6 at the long end, but for daylight wildlife and sports, the hit rate is what matters, and this lens delivers.

Macro shooters should look elsewhere, as a 55.7 score and 0.21x magnification mean you won't be filling the frame with anything small. If you frequently shoot in dim conditions, the f/5.6 max aperture at the long end will force you to crank your ISO, so a used 70-200mm f/2.8 might serve you better. And if build quality is a dealbreaker, the 33rd percentile rating reflects a lot of plastic that doesn't inspire confidence for heavy professional use in rough weather, despite the weather sealing.

If you need a telephoto zoom for a Canon EF camera and your priorities are fast autofocus and reliable stabilization for handheld shooting, this is one of the best options you can buy without jumping to L-series glass. It's a top performer for wildlife and sports, and the NANO USM motor makes it a sneaky good choice for video work too. Just don't expect it to be a macro lens or a low-light champion, and try your hardest to find it at a price that reflects its plastic build. At the right price, it's a no-brainer.