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Specifications:
| Manufacturer | Sigma |
|---|---|
| Model | 4.5 mm f/2.8 EX DC CIRCULAR FISHEYE HSM |
| Lens style | Fisheye |
| Focal length | 4.5 mm |
| Maximum aperture | f/2.8 |
| Angle of view | 180 o |
| Closest focusing distance | 0.14 m |
| Maximum magnification | 1:6 |
| Minimum aperture | 22 |
| Number of diaphragm blades | 6 |
| Auto focus type | HSM |
| Lens Construction | 13 elements / 9 groups |
| Filter diameter | 72 mm |
| Macro | No |
| Available mounts | Canon EF Nikon F Sony A / Minolta Sigma Pentax K |
| Dimensions | 76.2 x 77.8 mm |
| Weight | 470 g |
| Additional information |
