Sigma AF-ε 28-70mm F3.5-4.5 Specifications
   
  Product ID: 
#619
  Compatibility: 
2001 issue (Err 99 - not compatible with Canon EOS bodies released since 2001)
  Diagonal Angle of View: 
75.4° - 34.3°
  Maximum Magnification: 
1:6.7
  Minimum Aperture: 
F22 - F27
  Number of Aperture Blades: 
6
  Iris Pattern: 
polygonal
  Minimum Distance: 
53cm
  Filter Thread: 
52mm
  Maximum Diameter: 
70mm
  Length: 
72.5mm
  Weight: 
460g
  Focus Type: 
front lens focus
  Zoom Type: 
rotary (straight helicoid extension)
  Lens Hood: 
bayonet mounted
  Produced: 
1988 - 1989
  Tests: 
 
   
  Additional Information: 
The lens does not feature a focus ring. Use the lens hood bayonet or front tube part, when extended (extends enough on shorter focal lengths up to 35mm). The distance scale only goes down to 1:6.9 at 55mm minimum focusing distance. 
Exakta sold a rebadge of this lens, as well as I think Quantaray did.