Samyang has officially announced the 20mm f/1.8 ED AS UMC lens. It is designed for full-frame DSLRs as well as APS-C and Micro Four Thirds mirrorless cameras.
The new optic will deliver a full-frame equivalent of 35mm when mounted on APS-C cameras and 40mm when mounted on MFT cameras. The bright f/1.8 maximum aperture allows users to isolate their subject from the background and enables hand-held shooting in low-light conditions.
The Samyang 20mm f/1.8 ED AS UMC will include 13 elements in 12 groups, using aspherical elements and Samyang’s ‘Ultra Multi Coat’ technology.
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http://www.dailycameranews.com/2016/08/samyang-20mm-f1-8-ed-umc/