Pentax smc Pentax-A 645 200mm f/4 - Pentax 645 Mount

The smc Pentax-A 645 200mm f/4 is a telephoto prime lens for the Pentax 645 medium format system. Providing an equivalent focal length of approximately 125mm in 35mm terms, it is highly regarded for its relatively compact size and optical performance. The 'A' series designation indicates the presence of an aperture ring setting that allows for automatic exposure modes when used on compatible 645 bodies. When purchasing used, it is important to check the 'A' setting lock on the aperture ring to ensure it engages correctly. SDS examines the internal optics for fungus or haze, particularly in the rear elements. We also test the manual focus action for consistency across the range and check the built-in retractable lens hood for any signs of mechanical resistance or damage.