Product Comparison: Nikon AF-S NIKKOR 20mm f/1.8G ED vs Sigma 20mm F1.4 DG HSM Art

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General Specifications
AF-S NIKKOR 20mm f/1.8G ED
20mm F1.4 DG HSM Art
About the Product
With a dynamic ultra-wide-angle perspective and fast f/1.8 maximum aperture, this FX-format prime lens is ideal when you want to exaggerate perspectives, expand space, and capture immersive images.
With a focal length of 20mm and F1.4 aperture, this lens delivers outstanding large-aperture brightness and bokeh, delivering unprecedented visual experiences. This lens is ideal not only for such ultra-wide-angle subjects as landscapes and starry skies, but also for snapshots in low light, indoor photography, portraits with a natural bokeh effect, and much more.
Key Specs
Mount Type
Nikon F-Bayonet
Nikon F-Bayonet
Maximum Aperture
1.8 /f
1.4 /f
Minimum Focal Length
20 millimeters
20 millimeters
Maximum Focal Length
20 millimeters
20 millimeters
Lens Type
What customers say about "Key Specs"
Nikon AF-S NIKKOR 20mm f/1.8G ED Fixed Lens
  • It focuses fast and quietly, and it has a wide enough aperture to get shots in low light settings like museums.
  • This lens has been a good performer.
  • The lens is sharp at 1.8.
  • Very nice bokeh for lens of this angle - due to 1.8 maximum aperture and ability to focus very closely.
  • Image resolution is quite sharp at f/1.8 and infinity focus.
Sigma 20mm F1.4 DG HSM Art Camera Lens
  • The 1.4 aperture is great for low light situations and also makes for great bokeh.
  • It works perfect even at 1.4.
  • Sharp pictures at wide open aperture.
  • The wide aperture is very helpful in shooting architectural interiors.
  • The pictures from a 20mm focal length are amazing.
Size & Weight
3.2 in.
3.6 in.
3.2 in.
3.6 in.
3.1 in.
5.1 in.
12.6 oz.
33.51 oz.
What customers say about "Size & Weight"
Nikon AF-S NIKKOR 20mm f/1.8G ED Fixed Lens
  • Excellent weight / sharpness ratio.
  • The lens is very compact and light.
  • Compact and light.
  • Very light weight, a tad lighter than the 50mm f/1.4G lens.
  • The lens is surprisingly light! Highly recommend.
Sigma 20mm F1.4 DG HSM Art Camera Lens
  • Good weight with my camera.
  • Compact lens for backpack.
  • Good size and weight. Highly recommend.
  • It is bulky and heavy.
  • The lens is big, heavy, and highly capable.
Minimum Focus Distance
7.92 in.
10.9 in.
Field Of View
FX 94° / DX 70°
Zoom Type
Auto Focus, Manual Focus
Auto Focus, Manual Focus
Optical Stabilization
What customers say about "Imaging"
Nikon AF-S NIKKOR 20mm f/1.8G ED Fixed Lens
  • Fast focus, light and a very fun lens.
  • Focus is fast. Distortion is absolutely reasonable.
  • Focus is blazing fast and it's the sharpest wide I have.
  • Auto focus is quiet and accurate. Manual focus is smooth and precise.
  • The focus is nice and smooth.
Sigma 20mm F1.4 DG HSM Art Camera Lens
  • Effective auto and manual focus.
  • The lens is beautifully built, with a large, smooth focus ring.
  • Autofocus is fast for f/1.4.
  • Autofocus is fast and quiet, and the focus ring is also smooth and quiet.
  • The Autofocus works quickly and very precisely.
Brand Compatibility
Sensor Type Compatibility
FX Format / DX Format
FX Format / DX Format
Lens Groups and Elements
13 Elements in 11 Groups
15 Elements in 11 Groups
Number of Aperture Blades
Filter Diameter
77 millimeters
Nano Crystal Coat, AF-S (Silent Wave Motor), Super Integrated Coating, ED (Extra-Low Dispersion) Glass, Rear Focusing System
HSM (Hyper-Sonic Motor), Rounded diaphragm, Exclusive low-dispersion glass
What customers say about "Features"
Nikon AF-S NIKKOR 20mm f/1.8G ED Fixed Lens
  • It takes 77mm filters which was a huge plus for me.
  • This is a very sharp lens, great for landscapes and star shots.
  • Very impressive feature of this lens is its close focusing.
  • Images are sharp and distortion free.
  • Ghosting and flare are very well controlled.
Sigma 20mm F1.4 DG HSM Art Camera Lens
  • Pleasantly surprised with the performance of this lens.
  • Excellent build quality.
  • Outstanding image quality.
  • Image quality is very high.
  • Suitable for full format and APS-C cameras. The price/quality ratio is good.
Warranty / Certifications
Manufacturer Warranty
1 year(s)
1 year(s)
Other Information
799.95 $

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