Yashica ML 70-210mm f/4 - Contax/Yashica Mount

The Yashica ML 70-210mm f/4 is a constant-aperture telephoto zoom lens for the Contax/Yashica mount. Unlike many variable-aperture zooms of its era, the f/4 maximum remains consistent throughout the zoom range. It features a 'one-touch' pump-zoom design, where a single ring controls both focus and focal length, and incorporates multi-layer coatings to improve contrast and colour rendition. The 'one-touch' mechanism is the most common failure point, often suffering from 'zoom creep' where the barrel slides under its own weight. SDS checks that the tension remains sufficient for practical use. We also inspect the lens for internal dust and ensure the aperture blades are dry and responsive, as oil migration is a known issue for older Yashica zooms.