| Attribute | Value |
|---|---|
| Diaphragm Blades | 6 |
| Diameter | 76.2 mm |
| Diagonal Angle of View | 180.00 degree |
| Aperture | 2.80 - 22.00 f |
| Notes | Available AF Mounts: Canon, Nikon, Pentax, Sigma, Sony; Included Accessories: Gelatin Filter Holder, Padded Case |
| Magnification Ratio | 0.17 x |
| Closest Focus | 0.14 m |
| Focus Details | Internal; HSM with full-time manual focus override |
| Lens Construction | 13 Elements in 9 Groups |
| Length | 77.8 mm |
| APS Equivalent | 1.5x: 6.8mm; 1.6x: 7.2mm |
| Focal Length | 4.50 mm |
| Image Circle | APS-C |
| Brand | Sigma |
| Name | Sigma 4.5mm f/2.8 EX DC Circular Fisheye HSM |
| Weight | 470 g |
| Type | Wide Prime |
| 35mm Equivalent | Add |
| Effective Reduction in Aperture | Add |
| Focal Length Multiplier | Add |
| APS-C Equivalent | Add |
| Zoom System | Add |
| Diaphragm Blades Type | Add |
| Filter Size | Add |
| Front Element Rotation | Add |