Sigma 18-50mm f/2.8-4.5 DC OS HSM - unknown Mount
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Sigma 18-50mm f/2.8-4.5 DC OS HSM - unknown Mount
A stabilized standard zoom lens for APS-C DSLRs featuring a fast f/2.8 maximum aperture at the wide end.
The Sigma 18-50mm f/2.8-4.5 DC OS HSM is a standard zoom lens designed specifically for APS-C digital SLR cameras. It features an Optical Stabiliser (OS) to reduce the effects of camera shake and a Hypersonic Motor (HSM) for quiet, high-speed autofocus. The variable aperture allows for a relatively fast f/2.8 at the wide end, making it a versatile step-up from standard kit lenses for everyday photography and landscapes.
When purchasing a used example, inspect the Optical Stabiliser by checking for a steady viewfinder image at slower shutter speeds. The HSM motor should operate smoothly without grinding noises. We check the internal elements for dust or haze and ensure the zoom mechanism moves freely across the entire range. Common wear points include the rubber zoom ring, which can occasionally become loose or tacky over time.
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