Sigma 24-70mm F3.5-5.6 Aspherical HF
Launched February 2001
The SIGMA 24-70mm F2_S EX ASPHERICAL DF is one of several new products to be introduced at PMA 2001 by Sigma Corporation of Japan (2-3-15, Iwado-Minami, Komae-shi, Tokyo).
This lens covers focal lengths from 24mm super-wide angle to 70mm medium telephoto. It employs Helical Focusing system (HF) for focus adjustment, which allows straight movement of front lens elements. Thus, the front of the lens does not rotate, allowing the use of a “Perfect Hood” and the easy use of polarising filters. Minimum focusing distance from the film plane to subject at all focal lengths is 15.7″ (40cm). It incorporates aspherical lens to minimise distortion, sphetical aberration and astigmatism, resulting in high image contrast and resolution. The lens also features a depth of field scale that serves for determining the subject’s depth of field at a specific focal length and distance.
The lens materials used in this new lens are lead and arsenic free ecological glass.
|Construction||9 Elements in 7 Groups|
|Focal Length (4/3 Equivalent)||24-70mm|
|Field of View||48.5°|
|Minimum Focus Distance||40cm|
|Number of blades||8|
|SRP at launch:||NA|
|Available Mounts:||Sigma SA, Minolta, Nikon, Pentax, Canon|