Sigma 18-50mm F2.8 EX DC
Four-Thirds Fitting
Launched February 2006
18-50mm F2.8 EX DC – Four Thirds fitting
EX series, large aperture zoom lens designed specifically for use with digital SLR cameras is now available in the Four Thirds fitting.
- 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.
| Specifications | |
| Construction | 15 Elements in 13 Groups |
| Focal Length (4/3 Equivalent) | 36-100mm |
| Maximum Aperture | ƒ2.8 |
| Minimum Aperture | ƒ22 |
| Field of View (4/3 Equivalent) | 59-24° |
| Minimum Focus Distance | 28cm |
| Number of blades | 7 |
| Maximum Magnification | 1:5 |
| Zooming System | Counter-Clockwise |
| Filter Size | 67mm |
| Diameter | 74.1mm |
| Length | 84.1mm |
| Weight | 445g |
| SRP at launch: | £369.99 |
| Available Mounts: | Four-Thirds |