The Asahi Pentax M SMC 1:3.5 135mm camera lens is a high-quality portrait lens designed for Pentax K mount cameras. With a maximum aperture of f/3.5, this lens is ideal for capturing professional-looking portraits with beautiful bokeh. The manual focus capability allows for precise control over your images, while the Pentax SMC series ensures quality and durability. This lens is perfect for photographers looking to expand their creative capabilities and capture stunning portraits with their Pentax camera.