Sigma 70-210mm f2.8 APO
Launched 1992

From the Press Release dated 12 September 1992:

“The Sigma APO Zoom 70-210mm F2.8 has constant large aperture of F2.8. It is ideal tele zoom for sport photography. Since this lens is incorperation an internal focusing system, the front lens does not rotate, Also it is easier to use a polarizing filter. Sigma Apo Zoom Lens 70-210mm F2.8 for Nikon AF and Canon AF cameras have a “Biofocus” can focus manually the AF lens with manual focusing feeling and torque.”