Introduction Although Sigma only introduced the DN range specifically for Sony E and MFT mirrorless cameras a short while ago, they've already redesigned the exterior of the lenses and integrated them into the firm’s new A series product line. The new, metaled exterior finishis more in keeping with the minimalistic design of Sony’s E-Series than either the Olympus or Panasonic models, but it’s well made and features a new linear AF motor for smoother, quieter focusing during video (and stills), and two glass molded aspherical elements (with one being a double sided asphere). The MFT mount