Photo50 is an exhibition of contemporary photography and features fifty works, most for sale, curated by Sue Steward at the London Art Fair, the UK's largest for modern British and contemporary art.

This year, Photo50 opens up a spectrum of contemporary photography from the analogue to the digital. This selection of work by twelve photographers focuses on different ways of representing an image and it reveals the broad range of processes involved in image-making.

The exhibition runs from 18 to 22 January at the Business Design Centre, Islington, London, with entry costing £11 in advance or £16 on the door.

Steward writes: "I label them ‘alchemists’ because the term resonates with the ancient practitioners of photography, the experimenters with chemicals and paper, the pioneers of ‘writing with light’ which is what photo-graphy literally means.

"Many images in this exhibition were produced through analogue processes and reveal surprising similarities with their digital counterparts; many mingle the two. There is also the changing assumption that the photographic print is the finished object, the ultimate goal of production. But it is no longer necessarily the end-point; the printed paper is enduring the transformation, partially destroyed or decorated, re-built to take on a new dimension – and becoming an original art work in its own right.

"The works in Photo50 highlight the richness and diversity of photography today. It’s almost impossible now to define ‘photography’ because of its porous nature and its convergence with painting film and craft, demonstrated in this exhibition. It is a vast art form - and London is a hub for these significant, beautiful, seismic changes."