The Sigma 8-16mm f/4.5-5.6 DC HSM Ultra-Wide Zoom Lens is an ultra-wide angle lens designed specifically for APS-C DSLRs. FLD glass elements (with performance equal to fluorite) help compensate for color aberration while a hybrid aspherical lens and two glass mold elements provide excellent correction of distortion and astigmatism. Additional features: inner zoom system, full-time manual focus, hyper-sonic motor, super multi-coating, plus more! Includes lens hood and storage case.