With two aspherical glass elements, the Sigma 18 mm-50 mm f/2.8 camera lens offers clear images with minimum distortion. The SLD (Special Low Dispersion) glass of this Sigma zoom lens provides sharp and clear images without any abbreviations. The multi-layer lens coating of this Sigma camera lens delivers refined images by minimizing ghosting. The Sigma 18 mm-50 mm f/2.8 has a 28 cm minimum focal distance that offers exceptional close-up images. The 7 diaphragm blades of this Sigma zoom lens provide stunning background effects. The f/2.8 maximum aperture of the Sigma 18 mm-50 mm f/2.8 deliver clear and bright images even in poor lighting condition.