I found this cracking deal while looking for this lens. Unfortunately its for a Nikon fit and im after a canon fit but thought it was too good a deal not to post. It comes with a 3 year guarantee as well! RRP is £408.69 and next lowest is £293.99.
Sigma 18-50mm f2.8 EX DC Macro Lens
Large f/2.8 aperture standard zoom lens designed specially for use with digital SLR cameras
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 includes a Super Multi Layer coating, getting 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.
Special Low Dispersion and Aspherical lenses
A Special Low Dispersion (SLD) lens and two aspherical lens elements provide excellent correction for all types of aberrations.
Compact and Lightweight
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 (15.7oz).
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.
The DC Range
Being part of the DC range, this lens is designed only for use with digital SLR cameras, featuring an APS-C size image sensor or smaller.