PENTAX smc P-FA 40mm F2.8 Lens is an ideal standard lens that performs superbly. At only 15mm thick it is exceedingly thin. This exclusive "Limited Lens" assures exceptional image quality, with high contrast, high resolution, great sense of depth, and minimal aberrations. Sophisticated and portable it offers a natural perspective close to the naked eye. Like all PENTAX lenses, this lens is treated with the acclaimed smc coating for maximum light transmission, sharp definition, and high contrast images.