Sigma 18-50mm lens - Design|
The design produces a compact and lightweight, yet robust, construction with an overall length of 84.1mm (3.3in.) and 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 inner focusing system. The non-rotating front lens element makes the lens suitable for using its petal-type lens hood and circular polarizing filters. It is an ideal large aperture standard zoom lens for digital SLR cameras featuring APS-C size image sensor.
Sigma 18-50mm F2.8 EX DC lens specifications
- 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: 28cm (11in.)
- Maximum Magnification: 1:5
- Filter Size: 67mm
- Lens Hood: Petal-type hood
- Dimensions: Diameter 74.1mm (2.9 in.)X Length 84.1mm (3.3in.)
- Weight: 445gr/15.6ounces
Sigma - EX lenses details
EX series, large aperture zoom lens designed specifically for use with digital SLR cameras. Some of the EX details are: EX lens series denotes excellence of engineering and new technology, Compact and lightweight zoom 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 and Super Multi Layer (SML) coating reduces flare and ghosting from which digital cameras tend to suffer.