The Sigma 20mm f/1.8 EX DG is a 20 mm prime lens with a maximum aperture of f/1.8 for the Sigma SA, Canon EF, Minolta AF mounts. Here are its field of view on different sensors, hyperfocal distances, Milky Way exposure limits and the cameras it fits.
Focal length
20 mm
Max aperture
f/1.8
Mount
Sigma SA
Designed for
Full frame
Field of view by sensor
| Sensor | Diagonal angle of view | 35 mm equivalent |
|---|---|---|
| Full frame | 94.5° | 20 mm |
| APS-C (1.5×) | 70.5° | 31 mm |
| Canon APS-C (1.6×) | 68.1° | 32 mm |
| Micro Four Thirds | 56.8° | 40 mm |
Hyperfocal distance
| Focal length | f/2.8 | f/5.6 | f/8 | f/11 | f/16 |
|---|---|---|---|---|---|
| 20 mm | 4.8 m | 2.4 m | 1.7 m | 1.2 m | 0.9 m |
Circle of confusion 0.030 mm (sensor size the lens is designed for).
Longest exposure for sharp stars
| Camera | NPF rule (wide open) | 500 rule |
|---|---|---|
| Full frame (24 MP) | 12.0 s @ f/1.8 | 25.0 s |
| Full frame (45 MP) | 9.8 s @ f/1.8 | 25.0 s |
| APS-C (24 MP) | 9.0 s @ f/1.8 | 16.3 s |
Cameras that fit (306)
- Sigma sd Quattro
- Sigma sd Quattro H
- Sigma SD1
- Sigma SD1 Merrill
- Sigma SD9
- Sigma SD10
- Sigma SD14
- Sigma SD15
- Canon EOS 5DS2015
- Canon EOS 5DS R2015
- Canon EOS 6D2012
- Canon EOS 6D Mark II2017
- Canon EOS 5D Mark IV2016
- Canon EOS 5D Mark III2012
- Canon EOS 5D Mark II2008
- Canon EOS 5D
- Canon EOS-1Ds
- Canon EOS-1Ds Mark II
- Canon EOS-1D Mark II
- Canon EOS-1D Mark II N
- Canon EOS-1Ds Mark III
- Canon EOS-1D Mark III
- Canon EOS-1D Mark IV
- Canon EOS-1D
- Canon EOS-1D X2011
- Canon EOS-1D X Mark II2016
- Canon 35mm film: full frame
- Kodak DCS Pro SLR/c
- Kodak DCS 520
- Canon EOS D2000
- Konica Minolta Maxxum 5D
- Konica Minolta Dynax 5D
- Konica Minolta Maxxum 7D
- Konica Minolta Dynax 7D
- Nikon D40
- Nikon D40X
- Nikon D50
- Nikon D60
- Nikon D70
- Nikon D70s
- Nikon D80
- Nikon D902008
- Nikon D100
- Nikon D200
- Nikon D300
- Nikon D300S2009
- Nikon D5002016
- Nikon D6002012
- Nikon D6102013
- Nikon D7002008
- Nikon D7502014
- Nikon D7802020
- Nikon D8002012
- Nikon D800E2012
- Nikon D8102014
- Nikon D8502017
- Nikon D3000
- Nikon D3100
- Nikon D3200
- Nikon D33002014
Where to buy
B&H PhotoAmazonKEH (used)MPB (used)FAQ
What is the Sigma 20mm f/1.8 EX DG equivalent to on APS-C?
About 30 mm (1.5×) or 32 mm on Canon APS-C (1.6×).
Which cameras is the Sigma 20mm f/1.8 EX DG compatible with?
It fits Sigma sd Quattro, Sigma sd Quattro H, Sigma SD1, Sigma SD1 Merrill, Sigma SD9 and more (see the full list above).