The Photokina show was the launchpad for five lenses from Sigma, four of which are designed for the Four Thirds digital SLR system.

Among the newcomers are an 18-200mm f/3.5-6.3 DC OS image stabilising lens (pictured). Exclusively designed for use on digital SLRs the lens includes two aspherical elements, as well as two Special Low Dispersion glass elements.

The 18-200mm boasts Sigma?s Optical Stabiliser (OS) whereby two sensors inside the lens aim to detect vertical and horizontal movement and help reduce camera shake. A UK price is yet to be confirmed.

Meanwhile the Four Thirds newcomers are an 18-50mm f/2.8 EX DC Macro whose features include a maximum magnification of 1:3. It will cost £369.99 and we understand that this lens will also be available in a non-Four Thirds fit for Sigma AF, Sony AF, Nikon AF, Canon AF and Pentax AF.

The other Four Thirds compatible lenses are a 24mm f/1.8 EX DG Aspherical Macro costing £299.99; a 135-400mm f/4.5-5.6 APO DG lens carrying a £479.99 pricetag; and a 300-800mm f/5.6 EX DG APO HSM telephoto which will hit stores costing a penny under £5,000.

Sigma now has 11 Four Thirds lenses in its range.

Availability dates for the new lenses were yet to be confirmed at the time of writing.

For details call Sigma Imaging UK on 01707 329999.

? Photokina is taking place in Cologne, Germany this week. Look out for future issues of AP for comprehensive coverage of news from the event which ends on 1 October