Sigma 21-35mm Zoom Gamma
Launched 1979
Sigma’s pioneering Zoom Gamma 21-35mm lens was the world’s first wide angle zoom, an area which Sigma continues to excel in today.
| Specifications | |
| Construction | ? Elements in ? Groups |
| Focal Length | 21-35mm |
| Maximum Aperture | ƒ3.5-4 |
| Minimum Aperture | ƒ? |
| Field of View | ?° |
| Minimum Focus Distance | ?cm |
| Number of blades | ? |
| Maximum Magnification | ? |
| Zooming System | One-Touch |
| Filter Size | ? |
| Diameter | ? |
| Length | ? |
| Weight | ? |
| SRP at launch: | ? |
| Available Mounts: | ? |