A constant f/2.8 standard zoom for Fujifilm X-mount APS-C bodies, covering a 27-75mm full-frame equivalent range. It is unusually small and light for a fast zoom, with a 4.8-inch minimum focus distance for close-up work and a dust- and splash-proof barrel. It suits travel, street and event shooters who want one bright lens instead of a bag of primes. Against Fujifilm's own 18-55mm f/2.8-4 and the larger 16-55mm f/2.8, it keeps the constant aperture at a fraction of the size, though it gives up optical stabilization and a wider wide end.
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Owners rate it highly as a compact, bright walkaround zoom that punches above its size. Most praise the constant aperture, light weight and sharpness, while noting the missing aperture ring and reliance on in-body stabilization.
The Sigma 18-50mm f/2.8 DC DN Contemporary is a standard zoom lens for APS-C FUJIFILM X-mount mirrorless cameras. It covers a 35mm equivalent range of 27-75mm and keeps a constant f/2.8 maximum aperture throughout the zoom range. It suits landscapes, portraits, street photography, architecture, events and video.
The optical design uses three glass-molded aspherical elements to help limit distortion and spherical aberrations. A Special Low Dispersion element reduces chromatic aberrations and color fringing. Super Multi-Layer Coating minimizes flare and ghosting, and in-camera aberration correction further reduces distortion and vignetting.
A stepping motor drives the autofocus, which is fast and nearly silent for video and moving subjects. The minimum focusing distance is 4.8", with a maximum magnification of 1:2.8 for close-up work. A rounded seven-blade diaphragm contributes to the bokeh quality. The lens has a dust- and splash-proof design.







