Sigma's fast constant-aperture telephoto — the 100-300mm f/4 for Canon EF professional use.
The Sigma 100-300mm f/4 EX DG HSM APO IF is a constant-aperture telephoto zoom from Sigma's EX class for Canon EF — f/4 constant. Canon EF mount.
100-300mm focal length. f/4 constant aperture. EX class. APO. DG = full-frame. HSM. IF. Canon EF mount.
The Sigma 100-300mm f/4 EX DG HSM APO IF is a professional constant-aperture telephoto — f/4 constant from 100-300mm, APO glass, HSM AF, IF focusing. EX class quality. A capable telephoto zoom for Canon EF.
On the used market the Sigma 100-300mm f/4 EX DG HSM is a professional telephoto. Condition checks: constant f/4, HSM, APO. Canon EF mount.