The sigma 24mm f/1.4 DG HSM Lens is a member of the highly regarded Art line
of sigma's Global Vision Series and is characterised by its advanced optical
construction and robust physical design. The combination of three "F" Low
Dispersion (FLD) elements and four Special Low Dispersion elements help to
achieve a marked reduction in chromatic aberrations, while a pair of aspherical
elements, with one positioned in the rear of the lens, minimise a variety of
additional distortions and aberrations. The 15-element-in-11-group optical
design is poised to deliver consistent peripheral brightness and sharpness,
even when working at the bright f/1.4 maximum aperture. A Super Multi Coating
has been applied to lens elements, too, to reduce flare and ghosting for higher
contrast and colour fidelity.