Sigma 21-35mm Zoom Gamma
Launched 1979

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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: ?