EX lens series denotes excellence of engineering and new technology.
Compact and lightweight zoom design despite large F2.8 aperture.
Excellent correction for various types of aberration provided by one
SLD (Special Low Dispersion) glass element and two aspherical lenses.
Super Multi Layer (SML) coating reduces flare and ghosting from which
digital cameras tend to suffer
The Sigma Corporation is pleased to announce the new 18-50mm 2.8 EX DC
for the Four Thirds fitting.
The characteristics of digital SLR cameras were taken into
consideration when designing the lens power layout. The new advanced
lens design corrects various aberrations. This lens provides the utmost
correction against lateral chromatic aberration which is a serious
problem for digital SLR cameras.
This lens is specially coated to get the best colour balance whilst
cutting down flare and ghosting, caused by reflections from the digital
image sensor and lens. It has excellent correction for vignetting and
superior peripheral brightness is ensured.
A Special Low Dispersion (SLD) lens and two aspherical lens elements
provide excellent correction for all types of aberrations. The design
produces a compact and lightweight, yet robust, construction with an
overall length of 84.1mm (3.3in.), maximum diameter of 74.1mm (2.9in.)
and weight of 445g (15.6oz).
This lens has a minimum focusing distance of 28cm (11in.). It is
equipped with an inner focusing system. The non-rotating front lens
element makes the lens suitable for using its petal-type lens hood and
circular polarizing filters.
|Focal Length (4/3 Format)
||15 Elements in 13 Groups
|Angle of View (4/3 Format)
|Number of Diaphragm Blades
|Minimum Focusing Distance
|| 28cm (11)
||Diameter 74.1mm (2.9)X Length 84.1mm