Sigma's fast DSLR telephoto zoom with OS stabilisation, competing with first-party 70-200mm f/2.8s.
The Sigma APO 70-200mm f/2.8 EX DG OS HSM is Sigma's professional constant f/2.8 telephoto zoom for full-frame and APS-C bodies, covering the 70-200mm range — the professional standard telephoto zoom range for events, sports, and portrait photography. OS (Optical Stabiliser) is built in. HSM (Hyper Sonic Motor) provides fast, quiet AF. The EX DG designation indicates Sigma's professional-grade optical quality for full-frame sensors. Available in Canon EF, Nikon F, and other mount versions.
The optical design uses 22 elements in 17 groups, including FLD and SLD elements for chromatic aberration control at f/2.8. Nine rounded aperture blades produce smooth bokeh. The 77mm filter thread is the professional telephoto standard. At 1,430g the lens is heavy — similar to brand-native f/2.8 70-200mm alternatives. Minimum focus distance of 1.4m. OS provides optical stabilisation. HSM motor enables fast, quiet AF with full-time manual focus override. Constant f/2.8 aperture throughout.
The 70-200mm f/2.8 range at constant aperture is the professional standard for event, wedding, and sports photography — providing the reach and aperture combination that covers the decisive-moment and action range simultaneously. OS stabilisation distinguishes this Sigma version from the non-IS Canon EF 70-200mm f/2.8L II or non-VR Nikon variants, enabling handheld video and slower-shutter stills with 200mm focal length. The FLD and SLD elements control the chromatic aberration common at wide apertures in telephoto designs.
On the used market the Sigma APO 70-200mm f/2.8 EX DG OS HSM is available at affordable professional telephoto zoom pricing. Condition checks: OS engagement, HSM AF response, zoom ring smoothness, and 77mm front element for marks. Confirm the mount version — Canon EF and Nikon F versions are both available and not interchangeable. The newer Sigma 70-200mm f/2.8 DG DN OS Sports provides improved optical performance in mirrorless-native form. Compatible with full-frame and APS-C bodies in the specified mount.