Sigma Press Release
EX series large aperture zoom lens designed specially for use with digital SLR cameras with a minimum focusing distance of 20cm.
2006.9.26 - The Sigma Corporation is pleased to announce the launch of the new 18-50mm F2.8 EX DC MACRO lens. This lens has a large aperture of F2.8 throughout the entire zoom range, a minimum focusing distance of 20cm (7.9”) and a maximum magnification of 1:3, making it ideal for close-up photography. Specially designed to suit the characteristics of digital SLR cameras this lens provides a high level of optical performance.Its design incorporates both glass-mold and hybrid aspherical lens technology which offers superior peripheral brightness, extremely high image quality as well as a compact and lightweight construction. Special Low Dispersion (SLD) and Extraordinary Low Dispersion (ELD) glass elements provide excellent correction of color aberrations. The super multi-layer lens coating reduces flare and ghosting, a common problem with digital cameras. High image quality is assured throughout the entire zoom range. An inner focusing system eliminates front lens rotation, making the lens particularly suitable for using the petal-type lens hood (supplied) plus circular polarizing filters.
18-50mm F2.8 EX DC MACRO FEATURES
Minimum focusing distance of 20cm with a maximum magnification of 1:3.
· Aspherical lenses offer compact and lightweight construction.
· SLD and ELD glasses offer excellent correction of color aberrations.
THE SPECIFICATIONS (Sigma mount)
* Focal Length : 18-50mm
* Minimum Aperture : F22
* Lens Construction : 15 Elements in 13 Groups
* Angle of View : 69.3°-27.9°
* Number of Diaphragm Blades : 7pcs
* Minimum Focusing Distance : 20cm (7.9”)
* Maximum Magnification : 1?3
* Filter Size : 72mm
* Lens Hood : Petal–type Hood
* Dimensions : Diameter 79mm (3.1in”)X Length 85.8mm (3.4”)
* Weight : 450gr /15.9oz
SIGMA DG UV 72mm : 00-85126-92374-7
SIGMA DG WIDE CIRCULAR PL 72 mm : 00-85126-92385-3
LENS HOOD LH780-04 : 00-85126-92362-4