Sigma 75-210mm f/3.5-4.5 Zoom - Unknown Mount

The Sigma 75-210mm f/3.5-4.5 is a vintage telephoto zoom lens produced for various film SLR mounts. It provides a useful focal range for portraiture and general telephoto work. The lens typically features a 'push-pull' zoom design, where one ring controls both focal length and focus. While optical performance is modest by modern standards, it offers a budget-friendly way to achieve telephoto reach on vintage film bodies or adapted mirrorless systems. On the used market, 'push-pull' zooms are susceptible to 'zoom creep' where the barrel slides under its own weight; SDS checks the tension of this mechanism. We inspect for internal haze and fungus, which are common in lenses of this age. The aperture blades should be snappy and free from oil. Given the variety of mounts this lens was produced in (K-mount, OM, FD, etc.), it is vital to verify the specific mount compatibility before purchase.