Super Multi-Layer Coating is offered and helps to minimize flare and ghosting for greater contrast and colour accuracy when working in strong lighting conditions. The Sigma 40mm f/1.4 DG HSM Art Series Lens - Sony E-Mount offers great optical performance and reliable design. Product DescriptionThe technical details behind this lensīeing part of the Art line within Sigma's Global Vision series, this lens is designed to achieve remarkable optical performance and is perfectly suited for artistic and creative applications.