Sigma constant f/2.8 with macro and HSM for Nikon DX, dual zoom/close-up at budget pricing.
The Sigma 18-50mm f/2.8 EX DC Macro HSM for Nikon F is an older constant-aperture APS-C standard zoom with macro capability and HSM autofocus. The constant f/2.8 with macro provides dual-purpose standard zoom and close-up capability in a single lens.
The constant f/2.8 provides consistent brightness that dramatically outperforms any kit zoom, and the macro mode enables closer focusing for detail shots. The HSM motor provides fast, quiet autofocus, and the EX build quality provides premium construction above budget alternatives.
Build quality is Sigma EX with quality materials. The constant f/2.8 with macro provides more versatility than the later DC DN Contemporary version, trading compactness for the macro capability that the newer design omits.
The Sigma 18-50mm f/2.8 EX Macro HSM offers constant f/2.8 with macro for Nikon DX at affordable used pricing. The macro addition provides close-up versatility above the newer but non-macro DC DN Contemporary alternative.