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Nikon AF-S Nikkor 20mm f/1.8G ED

Wide-angle prime lens for Nikon SLR cameras

Item # 05420051

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Discontinued item
1 question - 1 answer

Item # 05420051

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About the Nikon AF-S Nikkor 20mm f/1.8G ED

Sharp wide-angle performance in almost any light

A rocky, windswept coastline. New York City at night. A ballroom full of dancers at your daughter's wedding. You can capture it all with this fast, ultra-wide 20mm Nikon lens. Its impressive low-light capabilities provide nearly endless opportunities for shooting rich, natural-looking images — indoors and out — without the need for a flash. Superb Nikon optics and a large maximum aperture let you closely control depth of field while taking tack-sharp wide-angle photos, even when shooting wide-open at f/1.8. A perfect match for FX-format Nikon SLRs, this compact, lightweight lens also works great with DX-format cams.

Product highlights:

  • AF-S NIKKOR 35mm f/1.8G ED standard lens
  • designed for Nikon full-frame (FX) digital and select autofocus film SLR cameras (compatible with Nikon DX sensor SLR cameras)
  • effective focal length:
    • 20mm with full-frame (FX) sensor digital or 35mm film cameras
    • 30mm with Nikon DX sensor cameras
  • built-in Silent Wave Motor for fast, quiet, and precise autofocus
  • ideal for low-light and everyday shooting
  • two aspherical and two extra-low dispersion (ED) glass lens elements enhance sharpness and virtually eliminate flare even when shooting at the widest aperture setting
  • Super Integrated Coating (SIC) enhances light transmission efficiency for superior color saturation, contrast, and reduced flare
  • full-time manual focus capability allows instant autofocus override with a twist of the focus ring
  • minimum focus distance: 7.9 in.
  • minimum aperture: f/16
  • lens construction: 13 elements in 11 groups
  • diaphragm blades: 7
  • filter/attachment size: 77mm
  • lens is 3-1/4" in diameter, 3-9/16" long
  • weight: 12.6 oz.
  • warranty: 1 year
  • Our 60-day money-back guarantee
Supplied Accessories:
  • lens hood
  • front and rear lens caps
  • soft storage pouch
  • MFR # 20051

What's in the box:

  • AF-S NIKKOR 20mm f/1.8G ED lens (#20051)
  • LC-77 77mm Front lens cap (installed)
  • LF-4 Rear lens cap (installed)
  • HB-72 Lens hood
  • CL-1015 Soft Lens Case
  • User's Manual
  • 5 Years of Protection warranty sheet

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<< >>

More details on the Nikon AF-S Nikkor 20mm f/1.8G ED

Mark G.

Features & specs

Mount Type Nikon F-mount
Sensor Size Full frame
Image Stabilization No
Lens Type Wide angle prime
Focal Length 20mm
Maximum Aperture f/1.8
Weight 12.6 ounces
Parts Warranty 1 Year
Labor Warranty 1 Year
The Nikon AF-S Nikkor 20mm f/1.8G ED replaces these items:

Product Research



Overview: The Nikon AF-S Nikkor 20mm f/1.8G ED lens is an ultra-wide angle prime lens. It is optimized for FX-format cameras, but can be used with DX-format cameras (30mm equivalent). It is ideal for landscapes and architecture, wedding parties, concerts, crowd shots, and more. The lens comes with the HB-72 lens hood and the CL-1015 Soft lens case.

Silent Wave Motor (SWM): The exclusive Nikon Silent Wave Motor (SWM) enables fast, accurate, and quiet auto focus.

Focus Mode Switch: The Focus Mode switch on the barrel of the lens lets you easily switch between manual focus and auto focus. If you want to enable auto focusing, the camera must be set to Auto Focus, and the switch on the lens needs to be set to "M/A". With most Nikon D-SLRs, the lens gives you a manual override option, allowing you to rotate the separate focus ring while pressing the shutter release halfway.

Diaphragm: The lens is equipped with a rounded 7-blade diaphragm.


  • Type of Lens: Type G AF-S lens with a built-in CPU
  • Type of Mount: Nikon F-bayonet type
  • Focal Length: 20mm (30mm DX format equivalent)
  • Filter Diameter: 77mm
  • Lens Construction: 13 elements in 11 groups (including 2 ED lens elements, and lens elements with Nano-Crystal coatings)
  • Closest Focus Distance: 7.92" (0.66')
  • Focusing Method: Rear Focusing (RF) system with AutoFocus controlled by a Silent Wave Motor, and a separate focus ring for manual focus
  • Aperture Range: f/1.8 to f/16
  • Angle of View: 94° FX format (70° DX format equivalent)
  • Dimensions: Diameter=3.245" Length=3.524" (4.099" with caps)
  • Weight: approximately 12.6 ounces

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Customer Q&A

1 question already asked

Is this lens compatible to the Nikon D3100?
[ William  Feb 06, 2016 ]
1 answer
This Nikon AF-S Nikkor 20mm lens is not listed as compatible with the Nikon D3100 camera in our research. The D3100 was discontinued in our database before this lens was released though, so it's possible they would still work, we just don't have any info on confirmed compatibility. To find out for sure, your best bet would be to contact Nikon's Support directly at 800-645-6687. I hope that helps! My Bio:
[ Larry  Feb 10, 2016 ]  Staff

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