The Pentax-DA 50 mm f/1.8 is a fast, prime and lightweight lens designed exclusively for Pentax K-Mount digital cameras. This lens features a large, maximum aperture of f/1.8 and a round diaphragm to provide a natural bokeh (out of focus) effect, making it suitable for portraits and snapshots. Its large aperture allows faster shutter speeds and offers superior handheld, low-light performance with no blur or noise.