Nikon 18.5mm f/1.8 Lens for Mirrorless System Announced September 13, 2012 By Eric Reagan Leave a Comment Along with the new Nikon D600 DSLR, Nikon unveiled a new 18.5mm f/1.8 lens for its 1 Series mirrorless cameras. The 1 Nikkor 18.5mm f/1.8 offers a full frame effective focal length of 50mm. Essentially, the new lens becomes a “fast fifty” when used with the Nikon J1, J2 and V1 cameras. The new 18.5mm f/1.8 lens should be available in November for $189.95. It will be available in black, white and silver. You can order the lens here at B&H Photo.