Sigma 28-70 Zoom/AF
Launched 1992

2870f281992 1

May 1992’s first 28-70mm release from Sigma came in the form of the 28-70mm ƒ2.8 (AF) – the precursor to an essentially standard requirement for most photographers today. This lens went on to critical acclaim.

The humble PR accompanying the release belies the promise this lens offered:

“Sigma Zoom 28-70mm ƒ2.8 lens is constant aperture high speed wide to medium tele zoom lens. In spite of high speed zoom, this zoom lens can focus from infinity to 50cm, subject to film plane, without using macro mode switch.”

Focal Length 28-70mm
Maximum Aperture ƒ2.8
Minimum Aperture ƒ22
Lens Construction 13 elements in 10 groups
Field of View 75.4-34.4° (Diagonal)
Minimum Focus Distance 0.5m
Number of blades TBA
Maximum Magnification 1:5.9
Zooming System Rotary
Filter Size 72mm
Diameter 74.5mm (max.)
Length 92mm
Weight 553g
Lens Hood Bayonet
SRP at launch: TBA
Available Mounts: Nikon AF, Canon AF, Minolta AF, plus manual mounts.
2870f281992 2