Tokina officially announced the new 20mm f/2.0 prime lens. It is designed for mirrorless cameras with full-frame image sensors.

The Firin 20mm F2 FE MF is the first in Tokina product line compact form-factor super wide ultra fast F2 aperture manual prime lens.

The wide-angle optic has a construction of 13 elements in 11 group. All lens elements are carefully multi-coated that helps to reduce reflections and flares to an absolute minimum.

It performs excellent optical abilities due to perfectly placed two all-glass precision molded aspherical elements with 3 Super-Low Dispersion (SD) glass lens elements that are greatly reducing aberrations and yielding higher resolution and contrast.
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Read full post here:
http://www.dailycameranews.com/2016/09/tokina-firin-20mm-f2/