Pentax SMC Pentax-M 80-200mm f/4.5 - Pentax K Mount

The SMC Pentax-M 80-200mm f/4.5 is a manual focus telephoto zoom lens from the classic 'M' series, known for its robust all-metal construction and high-quality optics. It features a constant f/4.5 maximum aperture throughout the zoom range and a two-ring design for separate control of focal length and focus. It is prized for its tactile operation and durability on vintage Pentax K-mount bodies. Check used copies for stiff or dry grease in the focus and zoom rings, which can make fine adjustments difficult. SDS examines the internal elements for fungus or separation, which is more common in older telephoto designs. The aperture blades should be snappy and free from oil. Given its weight, ensure the mount shows no signs of warping or heavy impact damage.