EX series large aperture zoom lens designed specially for use with digital
SLR cameras with a minimum focusing distance of 20cm.
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. | 
