Sigma's APS-C superzoom with macro capability and OS stabilisation.
The Sigma 18-250mm f/3.5-6.3 DC Macro OS HSM is a wide-range APS-C all-in-one zoom for Canon EF-S and other mounts, covering a 27-375mm full-frame equivalent range with a macro designation indicating close-focus capability. OS (Optical Stabiliser) is built in for handheld telephoto use. The DC designation confirms APS-C-only image circle. At 470g it is compact for a 13.9x superzoom. Available in Canon EF-S, Nikon F, Sony A, and Pentax K mounts.
The optical design uses 16 elements in 13 groups. Seven rounded aperture blades produce acceptable out-of-focus rendering. The 62mm filter thread is a common APS-C superzoom size. At 470g the lens is moderate for its zoom range. Minimum focus distance of 0.35m provides macro-adjacent close-focus capability at the long end. OS provides handheld stability. HSM motor provides fast, quiet AF. Variable aperture from f/3.5 at 18mm to f/6.3 at 250mm. APS-C-only image circle.
The 27-375mm equivalent in a 470g lens with OS covers the full practical range for travel and everyday photography on APS-C in a single lens. The macro designation provides closer-than-standard minimum focus for small subjects at telephoto — not 1:1 macro reproduction but adequate for casual close-up work. OS extends handheld capability at 250mm for outdoor conditions. The trade-off across any superzoom is optical quality at the extremes of the zoom range.
On the used market the Sigma 18-250mm DC Macro OS HSM is affordable as a wide-range APS-C travel zoom. Condition checks: OS engagement, HSM AF response, zoom ring smoothness across the full 13.9x range, and front element for marks. Confirm the mount version at purchase — multiple mounts are available and are not interchangeable. Compatible with APS-C bodies in the specified mount; not for full-frame use.