Canon's original 300mm f/2.8L super-telephoto with IS stabilisation — first generation with ring USM AF.
The Canon EF 300mm f/2.8L IS USM is Canon's first-generation image-stabilised 300mm f/2.8 super-telephoto. The f/2.8 aperture at 300mm allows fast shutter speeds and effective subject isolation — essential for sports and wildlife at this focal length.
Outstanding optics — L-series quality with ED glass and fluorite elements. Ring USM AF is fast and precise. IS provides approximately 2 stops (first-generation IS). Compatible with 1.4x and 2x extenders for 420mm f/4 or 600mm f/5.6. Heavy at 2550g.
Canon EF mount. Drop-in 52mm rear filter holder. L-series weather sealing. Tripod collar with rotating mount. Mark II version improved IS to 4 stops and reduced weight — check which version you are buying.
Check which version — IS Mark I or Mark II. Mark II is lighter and has better IS. Both require tripod or monopod for extended use. Test AF accuracy and IS for smooth engagement. Very expensive even used.