The FA 43"s 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 F1.9 lens features our acclaimed smc multi-layer coating to lower surface reflection, reduce ultraviolet rays, and deliver clear, high-contrast images. Specifications: Lens mount: - PENTAX KAF mount Lens construction: - 7 elements in 6 groups Angle of view: - 53? Diaphragm control: - Fully Automatic Number of aperture blades: - 8 Minimum aperture: - F22 Metering system: - TTL open-aperture metering Minimum focusing distance: - 1.6 ft. (0.45m) Filter size: - 49mm Maximum magnification: - 0.12X Dimensions (diameter x length): - 2.5 x 1.1 inches (64mm x 27mm) Weight (w/o hood): - 5.5 oz. (155g) Click here to download the entire specifications manual.