The Sigma 30mm f/2.8 EX DN is a new “Digital Neo” lens for Micro Four Thirds (MFT) and NEX system users. With an optical formula that comprises 7 elements in 5 groups and an iris diaphragm with 7 rounded blades, the Sigma 30mm f/2.8 EX DN has an angle of view of 39.6 degrees on MFT and 50.7 degrees on an E-mount camera, thus being equivalent to a 60mm and a 45mm lens, respectively. The lens benefits from a newly developed linear AF motor which moves the lens elements directly without the need for gears or the drive of other mechanical parts, the company says. Note that this is not a macro lens - the maximum reproduction ratio is only 1:8.1. The Sigma 30mm f/2.8 EX DN has a non-rotating 46mm filter thread and weighs in at 135 grams.