An update on the lens Sigma is going to announce this week - it will be a new Sigma 16mm f/1.4 DC DN Contemporary lens.
Sigma DN lens - for mirrorless cameras
High-performance lenses, designed exclusively for mirrorless interchangeable lens cameras. The latest technology for the lens design ensures high optical performance, a compact construction and quiet autofocusing. The superior telecentricity assures sharp and high resolution image quality across the entire image plane.
Sigma DC lens - for APS-C cameras
Optimized for DSLRs with APS-C size image sensors, Sigma DC lenses leverage original technology fostered in the development of Sigma SD series cameras. The configuration of lens elements and the lens coatings represent the culmination of decades of optical engineering experience. The result is truly excellent performance in a compact, lightweight format that offers outstanding flexibility to the serious photographer. (source)
Sigma already has a 30mm f/1.4 DC DN Contemporary lens for Sony E-mount and MFT.
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