The Sony E-mount 105mm f/2.8 DG DN Macro Art Lens, from Sigma, is a short-telephoto prime optimized for macro use. Its optical design incorporates one SLD element, which also helps to realize high clarity and color accuracy by suppressing various aberrations and color fringing.  A focus limiter switch also helps to boost focusing speed and precision, and there is also a customizable AFL button and dedicated focus mode switch. As part of the Art line within Sigma's Global Vision series, this lens is designed to achieve truly notable optical performance and is ideally suited for creative and artistic applications. One Special Low Dispersion (SLD) element markedly reduces chromatic aberrations and color fringing for improved clarity and color accuracy. True macro design affords a life-size 1:1 maximum magnification along with an 11.6" minimum focusing distance, and a 5.5" minimum working distance, to suit working with close-up subjects. The HSM also permits full-time manual focus control simply by rotating the focus ring at any time. A focus limiter switch can be used to constrain the focusing range within three zones for faster, more responsive performance: 11.6" to 1.6', 1.6' to infinity, and 11.6" to infinity. Built-in Autofocus-Lock (AFL) button which can be assigned additional functions widens the range of operations available on the lens.