Sigma 24-50mm f/4-5.6 UC - unknown Mount

The Sigma 24-50mm f/4-5.6 UC (Ultra Compact) is a highly portable standard zoom lens designed for film and full-frame SLR cameras. As part of Sigma's 'UC' series, its primary design goal was to minimise size and weight without sacrificing essential optical quality. It serves as a convenient 'walk-around' lens, covering wide-angle to standard focal lengths. Its simple construction and modest aperture range allow it to be one of the smallest zooms in its class. A common issue with used UC series lenses is the degradation of the external rubber or plastic coatings, which SDS inspects for stickiness or peeling. We also check the mechanical zoom and focus movements for smoothness, as these compact units can develop play in the barrel over time. The optics are checked for clarity, specifically looking for any signs of oil on the aperture blades or internal haze that might soften images.