| Name |
Sigma 20-40mm f/2.8 EX DG Aspherical |
| Image Circle |
35mm |
| Type |
Wide Zoom |
| Focal Length |
20 - 40mm |
| APS Equivalent |
1.5x: 30 - 60mm; 1.6x: 32 - 64mm |
| Max Aperture |
f/2.8 |
| Min Aperture |
f/22 |
| Diaphragm Blades |
8 |
| Lens Construction |
17 elements in 13 groups, including 2 aspherical elements |
| Diagonal Angle of View(Based on image circle) |
94.5 to 56.8 degrees |
| Focus Details |
Internal with Dual Focus mechanism |
| Front Element Rotation |
No |
| Zoom System |
Rotary |
| Closest Focus |
27cm / 10.6 in. |
| Magnification Ratio |
0.22x / 1:4.6 |
| Filter Size |
82mm |
| Dimensions(Length x Diameter) |
107.8mm x 89mm / 4.2 in. x 3.5 in. |
| Weight |
595g / 20.9 oz |
| Notes |
Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax |
| Typical Online Price |
US$449.99 |
