Sigma AF 28-70mm f/2.8 DG DN Contemporary L-mount
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| Weight: | 470 g |
| Brand: | Sigma |
| Equipment: | Lens hood |
| Description: | Mount: Mamiya 645, lens type: standard, focal length: variable, min. focal length: 55 mm, max. focal length: 110 mm, aperture F at min. focal length: 4.50, aperture F at max. focal length |
| Type: | Lens |
| Functions: | Focusing motor for Nikon F |
| Length: | 101.5 mm |
| Diameter: | 72.2 mm |
| Max. focal length: | 70 mm |
| Min. focal length: | 28 mm |
| Focal length: | Variable |
| Lens type: | Standard |
| Zoom ratio: | 2.5x |
| Minimum focus distance: | 0.19 m |
| Auto focus: | There is |
| Bayonet: | Leica L |
| Filter thread diameter: | 67 mm |
| Aperture F at max. focal length: | 2.8 |
| Minimum aperture F: | 22 |
| Number of aperture blades: | 9 |
| Security: | Dustproof, waterproof |
| Number of element groups: | 12 |
| Number of elements: | 16 |