The AF-S NIKKOR 20mm f/1.8G ED from Nikon is a wide-angle
lens that is compatible with both full frame FX and DX crop sensor
cameras. The fast f/1.8 maximum aperture allows a shallow depth of field
for selective focus use, as well as shooting in low-light situations.
The lens provides a 94° angle of view (30mm, 70° equivalent on DX-format
cameras), and has a minimum focus distance of 7.8", allowing you to get
close to your subject while isolating it from the background.
Two aspherical and two Extra-low Dispersion elements with Nano Crystal
Coating reduce sagittal flare and chromatic aberration, producing sharp
images throughout the frame. Nikon's Rear Focusing System eliminates
change in physical length of the lens when focusing. A Silent Wave Motor
provides quick, near-silent autofocusing. A soft pouch and lens hood