Features: High-quality camera prime lens, PK mount, replacement for Pentax full frame camera. F1.7 large aperture provides you with better background blurring and smooth bokeh, fits close-up and portrait photography. 50mm focal length enables you to take more natural and more real photos, ideal for daily photography of portrait, food and landscape. Adopts multi-layer coating technology, which can increase light transmission and sharpness, as well as reduce internal reflection like flaring/ghosting. 6 elements 5 groups lens construction, metal body, durable and anti-oxidation. Specifications: Color: Black Material: metal Focal Length: 50mm Aperture: max. F1.7, min. F22 Focus: Manual Anti-shake: not supported Closest Focus Distance: 0.45m Filter Diameter: 52mm Item Size: 6 * 5cm/ 2.4 * 2in(without caps) Item Weight: 175g/ 6.2oz (without caps) Package List: 1 * Lens 2 * Lens Caps