Sigma 18-50mm f/2.8 EX DC Macro - unknown Mount

The Sigma 18-50mm f/2.8 EX DC Macro is a professional-grade standard zoom for APS-C DSLRs, featuring a constant f/2.8 aperture throughout the range. As part of Sigma's EX (Excellence) series, it boasts superior build quality and optical coatings. It is an ideal upgrade from standard kit lenses, offering improved low-light performance and shallower depth of field, alongside a useful 20cm minimum focus distance. When purchasing a used model, the 'Zen' finish on older Sigma EX lenses can sometimes peel or become tacky; SDS checks the barrel condition carefully. We also verify the consistency of the constant aperture and ensure there is no decentering of the optical elements, which can occur if the lens has been dropped. The autofocus should be brisk and decisive.