Sigma 28-84 F3.5-4.5 Zoom Theta III
(AKA Synchro-II)
Announced October 1984
Sigma 28-84mm F3.5-4.5 Zoom Theta III
| Specifications | |
| Construction | 14 Elemts in 11 Groups |
| Focal Length | 28-84mm |
| Maximum Aperture | ƒ22 |
| Minimum Aperture | ƒ3.5-4.5 |
| Field of View | 75-23° |
| Minimum Focus Distance | 50 cm |
| Number of blades | NA |
| Maximum Magnification | 1:4.85 |
| Zooming System | Two Rings Rotary Type |
| Filter Size | 58 mm |
| Diameter | 67 mm (max.) |
| Length | 89 mm |
| Weight | 480g |
| SRP at launch: | £130 |
| Available Mounts: | MF: Nikon, Canon, Minolta, Pentax, Olympus, Ricoh, Contax, Yashica. |