Large maximum apertures only possible with fixed focal length lenses and outstanding imaging quality not possible with zoom lenses. The Voigtländer SLⅡ series of lenses are manual focus interchangeable lenses with unique features for single-lens reflex cameras. The mount is Nikon Ai-S mount with built-in CPU. This enables you to make full use of the camera’s exposure control functions. These lenses have imaging circles that amply cover the full frame, and provide the excellent image quality distinctive of fixed focal length lenses and the joy of focusing with your own hands.