| Sigma 120-300mm f/2.8 EX HSM Specifications | |
| Frame Coverage | 35mm |
| Lens Construction (groups) | 16 |
| Lens Construction (elements) | 18 |
| No. of Diaphragm Blades | 9 |
| Minimum Aperture | 32 |
| Closest Focusing Distance | 1.8m (70.9") |
| Maximum Magnifcation | 0.12x |
| Filter Diameter | 105mm |
| Maximum Diameter x Length | 112.8mm x 271mm (4.4" x 10.7") |
| Weight | 2600g (91.7oz) |
Reviews
Source
Photodo.com
In our tests we found the contrast throughout the zoom range is consistently good and it’s virtually as sharp wide open as it is stopped down two or three apertures. There’s no visible degrading at the edges, even on 35mm.
The-Digital-Picture.com
The Sigma is close to the Canon 70-200 L IS in sharpness at overlapping focal lengths, but is not as sharp at 300mm as the very impressive Canon 300mm f/2.8 L IS. Of course, you need both Canons to cover the same focal length range as the Sigma.
