This bright, ultra-wide 20mm prime lens makes an exciting choice for wide-angle photography Advanced optics, the wide Z mount, and the f/1.8 rounded 9-blade aperture enable thrilling performance in any light. Sharpness is superb edge to edge, and exceptional at close distances thanks to a minimum focus distance of just 0.20 m. ED glass and Nikon's anti-reflective Nano Crystal Coat combat ghosting and flare- no matter the setting, this mirrorless lens will capture so much more.