(From Pentax lens literature) The unique Pentax SMC P-FA 43mm ƒ/1.9 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 43mm ƒ/1.9 lens features our acclaimed SMC multi-layer coating to lower surface reflection, reduce ultraviolet rays, and deliver clear, high-contrast images.