Best Overall
Canon RF 100-400mm IS USM
Key details
- Weight
- 1.8 lb
- Focal Length
- 100-400mm
- Max Aperture
- f/5.6-8
- Stabilization
- Up to 5.5 stops (6 with IBIS)
816 grams is what makes the RF100-400 worth recommending before anything else about it. We carried it on a strap through a long afternoon without noticing it, and that's the difference between a telephoto that comes with you and one that stays in the cupboard. The 100-400mm range covers portraits, field sports, and a decent amount of wildlife, and the stabilizer is rated to 5.5 stops on its own, up to 6 on a body with in-body stabilization.
Optically it does more than survive its price. Detail holds across the range, and Nano USM focuses quickly and quietly enough that we were happy using it for video as well as stills. The close-focus numbers are the underrated part: 2.89 feet at 200mm and 0.41x magnification at 400mm turn it into a half-decent close-up lens between wildlife outings.
What you accept is light. At 400mm the aperture is f/8, so overcast afternoons, indoor gyms, and dawn will push your ISO in a way an f/5.6 lens wouldn't. In proper daylight it never came up. It also isn't weather-sealed, so pack a rain cover if you shoot in the open.
Pros
- 816 g is light enough to carry all day
- Stabilizer rated to 5.5 stops, 6 with IBIS
- 0.41x close focus at 400mm
- Fast, quiet Nano USM autofocus
Cons
- f/8 at 400mm is a daylight aperture
- Not weather-sealed
We think most Canon mirrorless owners should start here: sharp to 400mm, stabilized, and light enough to carry all day.