The Sigma 18-50mm f/2.8 EX DC is a 18–50 mm zoom lens with a maximum aperture of f/2.8 for the Sigma SA, Nikon F AF, Pentax KAF mounts. Here are its field of view on different sensors, hyperfocal distances, Milky Way exposure limits and the cameras it fits.
Focal length
18–50 mm
Max aperture
f/2.8
Mount
Sigma SA
Designed for
1.53× crop
Field of view by sensor
| Sensor | Diagonal angle of view | 35 mm equivalent |
|---|---|---|
| APS-C (1.5×) | 76.3° – 31.6° | 28–76 mm |
| Canon APS-C (1.6×) | 73.8° – 30.3° | 29–80 mm |
| Micro Four Thirds | 62.0° – 24.4° | 36–100 mm |
Hyperfocal distance
| Focal length | f/2.8 | f/5.6 | f/8 | f/11 | f/16 |
|---|---|---|---|---|---|
| 18 mm | 5.9 m | 3.0 m | 2.1 m | 1.5 m | 1.1 m |
| 50 mm | 46 m | 23 m | 16 m | 12 m | 8.0 m |
Circle of confusion 0.020 mm (sensor size the lens is designed for).
Longest exposure for sharp stars
| Camera | NPF rule (wide open) | 500 rule |
|---|---|---|
| APS-C (24 MP) | 11.9 s @ f/2.8 | 18.2 s |
Cameras that fit (140)
- Sigma sd Quattro
- Sigma sd Quattro H
- Sigma SD1
- Sigma SD1 Merrill
- Sigma SD9
- Sigma SD10
- Sigma SD14
- Sigma SD15
- 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
- Nikon D34002016
- Nikon D35002018
- Nikon D5000
- Nikon D5100
- Nikon D5200
- Nikon D53002013
- Nikon D55002015
- Nikon D56002016
- Nikon D70002010
- Nikon D71002013
- Nikon D72002015
- Nikon D75002017
- Nikon D1
- Nikon D1H
- Nikon D1X
- Nikon D2H
- Nikon D2Hs
- Nikon D2X
- Nikon D2Xs
- Nikon D3
- Nikon D3X2008
- Nikon D3S2009
- Nikon D42012
- Nikon D4s2014
- Nikon D52016
- Nikon D62020
Where to buy
B&H PhotoAmazonKEH (used)MPB (used)FAQ
What is the Sigma 18-50mm f/2.8 EX DC equivalent to on APS-C?
It is designed for a 1.53× sensor, giving a full-frame equivalent of 28–76 mm.
Which cameras is the Sigma 18-50mm f/2.8 EX DC 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).