Camera Basics
Camera Choosing
Camera Models
Camera Buying
DSLR Buying
Sigma 20mm F1.8 EX DG ASP RF Lens
For Nikon F Mount
Fixed focal-length. No zoom.
Rectilinear are normal lenses that show straight lines as straight lines.
Thread size in milimeters for screw-on filters.82
Autofocus Lens
Discontinued: No longer produced by the manufacturer. May still be in stock or found used.Lens Description
The Sigma 20mm F1.8 EX DG ASP RF is an ultra-wide prime designed for cameras with a Full-Frame sensor. This ultra-bright prime has a 20mm focal-length.
This prime lens focuses down to 20cm from the imaging plane, capturing subject with a maximum 0.25X magnification. The lens supports autofocus and features a switch to disengage AF for focusing manually. A built-in focus motor is used to set the focus-distance. It allowed Sigma to optimize the motor precisely for this lens in order to maximize performance.
The lens weighs 520g.
This version of the lens has a Nikon F mount. It directly attaches and is fully compatible with all Nikon F mount cameras with Full-Frame or smaller sensors. Sigma also makes this lens for Canon EF, Pentax K, Sony A and Sigma S mounts.
Focal-Range
Angle-Of-View
Maximum Aperture
Viewing Angle Range
Maximum Aperture
Magnification
Weight
Sigma 20mm F1.8 EX DG ASP RF Specifications
| Brand | Sigma | Model | 20mm F1.8 EX DG ASP RF |
|---|---|---|---|
| Mount | Max FLM | 1X | |
| Focal Length | 20mm | View Angle | 94° |
| Max Aperture | F/1.8 | Min Aperture | F/22 |
| Min Focus | 20cm | Magnification | 0.25X |
| Filter Size | 82mm | Aperture Blades | 9 |
| Size (D x L) | 89 x 87mm | Weight | 520g |
| Tilt | N / A | Shift | N / A |
| Stabilization | Protection | None | |
| Zoom Drive | N / A | Focus Drive | AF with MF Switch |
| Zoom Mechanism | N / A | Focus Mechanism | Internal |
| Hood | Bayonet | Focus Motor | Internal |
| Perspective | Rectilinear | Introduced |
Similar Lenses For Nikon F Mount
Here are the newest lenses matching or exceeding major specifications of the Sigma 20mm F1.8 EX DG ASP RF. They cover the same focal-range with a similar aperture and are available for the same lens mount and imaging circle coverage.
Irix Dragonfly 21mm F/1.4
ZY Optics Mitakon Creator 20mm F/2
Samyang 20mm F/1.8 ED AS UMC
Samyang 20mm T/1.9 ED AS UMC
Sigma A 20mm F/1.4 DG HSM
Nikkor AF-S 24mm F/1.8G ED
FIND ALL SIMILAR LENSES
Updates
2024.11.18
Best 2024 Photography Gifts for Every Budget
Great gifts for photographers and photo enthusiasts selected for every budget among the best products of 2024.
2024.08.07
Eye Protection Tips for Professional Photographers
The four main considerations for professional photographers regarding eyewear.
2024.07.14
Fujifilm X100VI Review
Flagship fixed-lens compact digital camera with a 40 MP sensor and Image-Stabilization, a first for the series. Retro design featuring dual control-dials, plus direct ISO, Shutter-Speed and EC dials. Its hybrid viewfinder can switch between EVF and OVF mode.
2024.05.09
Fujifilm GFX100 II Review
Flagship 102 Megapixels Medium-Format Mirrorless Digital Camera with 8-Stop 5-Axis IBIS, 8 FPS Drive, 8K Video and 400 MP Super-Resolution capture in a weatherproof and freezeproof body with dual control-dials and dual memory-card slots.
2024.04.03
Fujifilm X-T5 Review
Newest Fujifilm flagship boasting a 40 MP APS-C sensor, 5-axis IBIS with 7-stop efficiency, 15 FPS continuous drive, 6.2K Video capture, dual control-dials and dual SDXC UHS-II slots in a sturdy weatherproof and freezeproof body.
2023.11.20
Best Digital Cameras of 2023
Find out which are the Best Digital Cameras of 2023. All the new Mirrorless Digital Cameras from entry-level to high-end professional.
2023.07.10
Fujifilm X-H2 Review
40 Megapixels APS-C Hybrid Mirrorless Digital Camera with 7-stop IBIS. Fastest shutter ever and 8K video capture. Large builtin EVF with 0.8X magnification and 5.8 MP, plus an Eye-Start Sensor. Packed with features and large number of controls in a weatherproof and freezeproof body.
2023.05.07
Sony FE 20-70mm F/4G Review
Review of the unique Sony FE 20-70mm F/4G lens. The optical zoom of this lens spans ultra-wide-angle and medium focal-length coverage, making it one of the most versatile Full-Frame lenses on the market.
2023.01.15
Huion Inspiroy Dial 2 Review
Review of the Huion Inspiroy Dial 2 tablet, a medium sized drawing surface with dual dials and customizable buttons. Connects via USB-C or Bluetooth 5.0 with Windows, Linux and Android support.
2022.12.08
How to Pack for a Photo Trip
Find out how to pack for a travel photography trip, carry your gear safely while meeting airline regulations.
2024.11.18
2024.08.07
2024.07.14
2024.05.09
2024.04.03
2023.11.20
2023.07.10
2023.05.07
2023.01.15
2022.12.08
Please Support Neocamera
All information on Neocamera is provided free of charge yet running this website is a huge endeavor. Purchases made via affiliate links found throughout the site help keep it running and up-to-date. There is no additional cost to you, so please consider buying via these links to our affilates:
If you found any information on this site valuable and did not purchase via our affiliate links, please considering donating via PayPal:
Any amount will be greatly appreaciated. Thank you for your support!
Sigma 20mm F/1.8 Facts
Fixed focal-length. No zoom.Rectilinear are normal lenses that show straight lines as straight lines.Thread size in milimeters for screw-on filters.82Autofocus LensDiscontinued: No longer produced by the manufacturer. May still be in stock or found used.| 20mm Focal-Length | F/1.8 Constant Aperture |
| 82mm Filter Thread | AF with MF Switch |
| Nikon F Mount | Full-Frame Coverage |
| 520g Lens Weight | 89 x 87mm (D x L) |
Camera Bag
Your camera bag is empty. To add a camera or lens click on the star next to its name.
Your camera bag is empty.
Add cameras or lenses by clicking on the star next to their name.
New Cameras & Lenses
Venus Optics Laowa 100mm F/2.8 Tilt-Shift 1X Macro
Sony E Mount Prime Lens
2024-12-17Venus Optics Laowa 100mm F/2.8 Tilt-Shift 1X Macro
Nikon Z Mount Prime Lens
2024-12-17Venus Optics Laowa 100mm F/2.8 Tilt-Shift 1X Macro
Leica L Mount Prime Lens
2024-12-17Venus Optics Laowa 100mm F/2.8 Tilt-Shift 1X Macro
Canon RF Mount Prime Lens
2024-12-17Venus Optics Laowa 100mm F/2.8 Tilt-Shift 1X Macro
Fujifilm G Mount Prime Lens
2024-12-17
Venus Optics Laowa 55mm F/2.8 Tilt-Shift 1X Macro
Fujifilm G Mount Prime Lens
2024-12-17
