Sigma 135mm f/3.5 Pantel - Unknown Mount

The Sigma 135mm f/3.5 Pantel is a manual focus prime lens noted for its unique 'Pantel' feature, which allows the aperture to be closed down to f/64. This provides an exceptional depth of field, making it useful for specific technical or landscape applications where extreme sharpness across planes is required. It is a compact telephoto lens with a standard 52mm filter thread. Potential buyers should focus on the condition of the aperture ring, ensuring it clicks cleanly all the way to f/64. Due to its age, mechanical wear in the focus helicoid is a point of interest; SDS ensures the movement remains fluid and consistent. We also check for any signs of separation in the lens elements and verify that the glass is free from scratches that could impact image contrast.