specifications:
Focal length: 24-35mm
Aperture ratio: 1:3.5
Construction: 12 elements in 9 groups (including one aspherical lens)
Coating: S.S.C. (super spectra coating)
Angle of view: Diagonal 84°- 63°; Vertical 63° - 38°; Horizontal 74° - 54°

The Basic Wide-Angle Zoom Range The 24-35mm zoom covers the range of the three basic wide-angle lenses, 24mm, 28mm and 35mm. Although its zoom ratio of 1.46 may appear small, the actual visual difference is substantial. There are times when the need to switch lenses interferes with the process of composition and shooting. With the 24-35mm zoom you can move back and forth between focal length extremes, changing the field of view in one smooth, uninterrupted action in the search for the right framing. As a matter of fact, many of the techniques using wide-angle zooms involve exploring the possibilities of a scene or situation without having to change location.