Single-focus interchangeable lens for Pentax 67. SMC Pentax 200mm f4 Because it's a single-focus lens, it's less prone to flare and ghosting even in backlight, and the price is much cheaper than zoom lenses. It has been stored long-term in a dehumidified storage cabinet set to 55% humidity, so there is no balsam separation or deterioration of the lens coating. There are no scratches and it is a like-new, extremely beautiful item, so it's a great deal. A soft carrying case (with strap) is included. Focal length...151-200mm Maximum aperture...2.9-4 Other features...Front lens cap included, Rear lens cap included