The unique PENTAX smc P-FA 43mm F1.9 Limited lens is close to perfect in terms of focal length. Its natural perspective of subjects makes it ideally suited for everyday use including indoor photography, traveling, and hiking. Like every PENTAX lens, the smc P-FA 50mm F1.4 lens features our acclaimed smc multi-layer coating to lower surface reflection, reduce ultraviolet rays, and deliver clear, high-contrast images.