|AF-S||The lens is equipped with ultrasonic motor to provide very fast and virtually silent autofocus. Learn more|
|G||The lens has no aperture control ring and only supports electronic aperture control from the camera. G lenses provide distance information to the camera as D-type lenses.|
|ED||The lens incorporates one or several low dispersion elements to minimize chromatic aberrations and ensure excellent sharpness and contrast even at maximum aperture.|
|Position in the lineup|
|Nikon AF-S Nikkor 20mm F/1.8G ED||Sep 2014||⊗|
|Nikon AF Nikkor 20mm F/2.8D||Mar 1994||⊗|
|Nikon AF Nikkor 20mm F/2.8||Feb 1989||⊗|
|Nikon AI-S Nikkor 20mm F/2.8||Oct 1984||⊗|
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|Maximum format:||35mm full frame|
|Diagonal angle of view:||94.5° (35mm full frame)
70.5° (Nikon APS-C)
|Lens construction:||13 elements in 11 groups, including 2 ASPH, 2 ED|
|Closest focusing distance:||20 cm|
|Number of diaphragm blades:||7|
|Type of autofocus motor:||Ultrasonic (Nikon F)
|Full-Time Manual Focus:||Yes|
|Maximum diameter x Length:||Ø82.5 x 80.5 mm|
|Materials:||High-quality plastic barrel, metallic mount|
|Filter size:||77 mm|
The lens barrel is of moderate weight, made of high-quality plastic. The lens mount is metallic.
The lens features M/A - M focus mode switch.
|M/A||Autofocus mode that allows switching to manual focus with virtually no time lag - even during autofocus servo operation and regardless of autofocus mode in use.|
|M||Manual focus mode.|
The lens uses front filters with standard size of 77 mm which are easy to find. However, filters of such size are more expensive and mainly used with professional lenses.
The filter thread does not rotate during focusing which allows convenient use of different types of filters (including but not limited to polarizing and gradient).
Aspherical elements (ASPH, XA) minimize spherical aberration, astigmatism, coma and ensure excellent sharpness and contrast even at maximum aperture.
Low dispersion elements (AD, ED, LD, HLD, SD, UD etc) and fluorite elements minimize chromatic aberrations and ensure excellent sharpness and contrast even at maximum aperture.
|Camera||Nikon D3X||Nikon D3X|
|Sensor size||35.9×24 mm||35.9×24 mm|
|Distortion||-1.6 %||-1.53 %|
|Vignetting at F/1.8||-2.44 EV||-1.92 EV|
|User Manual. Multilingual, Adobe PDF, 1 MB|
Alternatives (AF, 17..23 mm)
|Nikon AF Nikkor 18mm F/2.8D||1994||⊗|
|Nikon AF Nikkor 20mm F/2.8||1989||⊗|
|Nikon AF Nikkor 20mm F/2.8D||1994||⊗|
|Sigma 20mm F/1.4 DG HSM | A||2015||⊗|
|Sigma 20mm F/1.8 EX DG Aspherical RF||2000||⊗|