The PENTAX FA 24-70mm F2.8 ED lens consists of 17 elements in 12 groups, the newly designed optics feature three ED (Extra-low Dispersion) optical elements, one anomalous-dispersion-glass aspherical optical element and three aspherical optical elements to accommodate super-high-resolution image sensors. By assuring sufficient light levels even at the edges of the image field and compensating various aberrations to a minimum, it provides a high MTF (Modulation Transfer Function) and delivers well-illustrated, fine-detailed images that are rich in contrast and resolution across the entire image field. When mounted on a current PENTAX K-series camera body, it uses only the central area of the image circle so that it delivers high-resolution images with uniform image description over the entire image field.