Budget Sigma ultra-wide at 10-20mm for APS-C, dramatic 16mm equivalent perspectives at affordable pricing.
The Sigma 10-20mm f/4-5.6 DC EX is the variable-aperture variant of Sigma's APS-C ultra-wide zoom, lighter and more affordable than the constant f/3.5 version. The mount is unspecified — available in Canon EF, Nikon F, Pentax K, and other mounts.
The 10mm ultra-wide provides dramatic 16mm equivalent perspectives on APS-C with the variable f/4-5.6 aperture. The EX designation indicates premium build quality, and the ultra-wide capability provides dramatic perspectives impossible with standard zooms.
Build quality is Sigma EX with quality construction above budget alternatives. The variable aperture keeps the lens more compact and affordable than the constant f/3.5 version while providing the same focal length range.
The Sigma 10-20mm f/4-5.6 offers affordable ultra-wide APS-C coverage at budget used pricing. The dramatic perspectives at 10mm provide creative capability that no standard zoom can match.