Adobe has released the first commercial version of its Photoshop Lightroom photographic software. Those who purchase the software before 30 April will pay £125 plus VAT, but after that date the price rises to £175 plus VAT.

Photoshop Lightroom was available as a freely-downloadable beta since its announcement over a year ago. The current beta 4.1 will expire on 28 February, after which users will have to purchase the full version to carry on using it.

The 1.0 release adds a set of new features to those in the version 4.1 beta. The Library module gains advanced keywording tools to help photographers filter through large collections, and an improved import dialogue with more flexible file handling to allow more choice when determining file location.

The new Key Metadata Browser provides quick access to key information tags. It provides an improved ranking and rating system, says Adobe, with colour labels and a pick/reject system.

The Develop module gains Virtual Copies and Snapshot tools. These provide multiple versions of the same image for comparison, without having to save physical versions. A new tool provides precise controls over hue, saturation and luminance, and the final release offers Clone and Healing brushes for sensor dust removal.

Support for more Raw image formats has been added, including those used by the Nikon D40 and D80, and Pentax's K10D. This brings the number of supported cameras to over 150.

Photoshop Lightroom runs under Windows XP or Mac OS X 10.4, though Adobe has not said whether Windows Vista is officially supported. The company says that the recommended system requirements for the software are a 1GHz Power PC or an Intel Pentium processor, 768MB RAM and a 1,024 x 768-resolution screen.