Canon L-series 300mm f/4 with IS, compact professional super-telephoto at excellent used pricing.
The Canon EF 300mm f/4L is an L-series telephoto prime for Canon EF cameras — lighter and more affordable than the f/2.8 version. Canon EF mount.
300mm focal length. f/4 maximum aperture. L-series optical quality. No IS (pre-IS version; an IS variant also exists). Full-frame. Canon EF mount.
The EF 300mm f/4L is a compact L-series telephoto — significantly lighter than the 300mm f/2.8L. Useful for wildlife and sports where portability is important. Note: an IS variant (EF 300mm f/4L IS USM) also exists — verify whether this is the IS or non-IS version from listing details.
On the used market the Canon EF 300mm f/4L is a capable L-series telephoto. Condition checks: L-series elements, AF, verify IS vs non-IS. Canon EF mount.