Nikon has announced full details of two more lenses on its full-frame Z-mount roadmap: a 20mm F1.8 S, and a 24-200mm F4-6.3 S with built-in stabilization. The 20mm F1.8 S is the widest prime in the native Z-mount lineup, and the 24-200mm F4-6.3 covers the widest focal range of existing FX Z series zooms.

The Nikon Z 20mm F1.8 S joins existing 24mm, 35mm and 50mm F1.8 primes for the system, and weighs 17.8oz (505g). Optically, it’s composed of 14 elements in 11 groups, including three ED and three aspherical elements. It uses a nine-blade aperture and offers Nano Crystal Coating. The Z 20mm F1.8 will accept 77mm filters.
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https://www.dpreview.com/news/6976332013/nikon-adds-20mm-f1-8-and-24-200mm-f4-6-3-to-full-frame-z-series-lens-lineup