Sigma has announced a 60mm f/2.8 lens for Micro Four Thirds and NEX system cameras. It offers a 35mm equivalent focal length of 90mm/120mm (NEX/MFT) and the lens has a rounded aperture diaphragm, a minimum focus distance of 19.7 inches and the maximum magnification is 1:7.2. It may be possible to address this for underwater use with diopters.This lens also contains Special Low Dispersion (SLD) glass, which helps minimize axial and transverse chromatic aberration and a linear AF motor. The Sigma 60mm f/2.8 DN lens has a 46mm filter thread. Prices and availability are still to be confirmed.