This lens has a minimum focusing distance of 7.9" (20cm) throughout the entire zoom range. Maximum magnification of 1:2.3 enables close-up photography like a macro lens. The new lens design and multi layer lens coating reduce flare and ghosting, which is a common problem with digital cameras. A Special Low Dispersion (SLD) lens and two aspherical lens elements provide excellent correction for all types of aberrations and produce a high level of optical performance.
The lens design incorporates an inner focusing system, which ensures fast AF speed as well as prevents the front of the lens rotating, making it particularly suitable for use with circular polarizing filters and petal shaped lens hoods. It is is also equipped with Zoom Lock Switch.
- Lens Construction: 15 Elements in 12 Groups
- Angle of View: 72.4 - 20.2 degrees (Sigma SD format)
- Number of Diaphragm Blades: 7 Blades
- Minimum Aperture: F22
- Minimum Focusing Distance: 20cm
- Maximum Magnification: 1:2.3
- Filter Size: Diameter 72mm
- Dimensions: Diameter 79mm x Length 82.5mm
- Weight: 455g