The Pentax SMCP-FA 43mm f/1.9 Limited is a lens that is close to perfect in terms of focal length. In the 35mm format the ideal definition of a "standard" lens is 43mm, the distance from the corner to corner on a frame of 35mm film.
The 43mm f/1.9 Limited Edition has robust construction for many years of use. Images are sharp and contrasty thanks to Pentax's Super Multi Coating process, which results in a high retention of light. An incredibly lightweight lens with wonderful results.