The Leica APO-MACRO-SUMMARIT-S 120 mm/f2.5 portrait lens is the fourth lens to be available for the 37.5 megapixels portable mastodon - the 35mm f/2.5, 70mm f/2.5 and 180mm f/3.5 were already available.

The new lens has been designed for portraits, beauty, product and macro photography, says Leica, and is the first "fast macro-telephoto lens with superior imaging quality in the Leica S-System line-up."

It is composed of nine elements in seven groups, including three elements with anomalous partial dispersion – "two of which are highest-quality fluoride lenses for the correction of chromatic aberration."

The lens is also dust and splash-proofed, says Leica.

UK pricing has yet to be determined.

The Leica S2 was first unveiled at Photokina in September 2008. At this year's Photokina, starting Monday 20 September, Leica is expected to announce new products. Check BJP from 20 September for more information or stay up-to-date with our daily newsletter.