The lens features 13 elements in 12 groups, with two Aspherical and three Extra-Low Dispersion elements to minimize aberration, reduce unnecessary light dispersion and deliver high resolution corner to corner. Minimum focusing distance is 8 inches, and filter size is 77mm.
Additional features include Ultra Multi Coating to minimize flare and ghosting, a non-rotating front lens design and circular 7-blade diaphragm, and a petal-type lens hood.
Housed in high-strength aluminum alloy, the 20mm F1.8 ($599 list price) is available in mounts to fit Canon, Nikon AE, Sony E, Micro 4/3, Pentax K and Fuji X.
The 20mm F1.8 is available now. Learn more at Rokinon.com.