400mm Lenses
A 400mm lens gives a long telephoto field of view, popular for wildlife, sports and distant subjects.
On APS-C a 400mm lens frames like about 600mm (Canon APS-C: 640mm) on full frame; on Micro Four Thirds it frames like 800mm.
We list 186 lenses that include 400mm: 53 primes and 133 zooms across 16 mounts, with a fastest aperture of f/2.8.