Sigma 70-210mm Zoom IA (Intelligent Auto)
Launched September 1992


Sigma IA Zoom 70-210m F4-5.6 is most popular range of 3x telezoom with Intelligent Auto zoom.

Sigma Intelligent Auto zoom is most sophisticated power zoom lens generally, power zoom lens is much difficult to control the zooming and almost impossible to make exact zooming stop at desired image size. However, Sigma inteligent auto zoom is easy to control zooming like manual zoom lens and has a full make of automatic zoom function, such as image fixing wide viewfinder multi-exposure during zooming.

Sigma intelligent zoom can change the zooming speed by travelling chestance as well as moving speed of the operation of the lens barrel. Also, Sigma Intelligent Zoom can make smooth and natural change of the zooming speed from start to highest speed and highest speed to stop by incorporating fuzzy logic control of the computer in the lens barrel.

Focal Length 28-70mm
Maximum Aperture ƒ3.5-4.5
Minimum Aperture ƒ22-27
Lens Construction 11 elements in 8 groups
Field of View 75-34° (Diagonal)

65.5-28.8° (Horizontal)

46.4-19.5° (Vertical)

Minimum Focus Distance 0.5m
Number of blades 6
Maximum Magnification 1:6.5
Zooming System Auto Zoom

Manual Zoom by rotation

Filter Size 52mm
Diameter 79mm (max.)
Length 86.5mm
Weight 350g
SRP at launch: TBA
Available Mounts: Minolta 3xi, 5xi, 7xi, 9xi