Fast APS-C telephoto zoom lens with EX APO and HSM features for Nikon F-mount.
The Sigma 50-150mm f/2.8 DC EX APO HSM is a constant-aperture telephoto zoom for APS-C Nikon DSLR cameras, equivalent to a 75-225mm f/2.8 on full-frame. DC = APS-C; EX = professional; APO = apochromatic correction for chromatic aberration control; HSM = Hyper Sonic Motor. Often called the APS-C equivalent of a 70-200mm f/2.8 zoom.
50–150mm zoom range (75–225mm equivalent on APS-C Nikon), f/2.8 constant maximum aperture, DC (APS-C), APO correction, EX/HSM construction, Nikon F mount.
The Sigma 50-150mm f/2.8 APO is a popular alternative to the 70-200mm f/2.8 for APS-C shooters who want the same telephoto perspective ratio in a smaller, lighter lens matching the APS-C sensor's crop factor. The APO correction delivers good colour accuracy across the zoom range.
Inspect for fungus, haze, and coating condition. Test HSM AF accuracy. Confirm Nikon F mount engagement. Check aperture blades. Test at 50mm and 150mm extremes.