Nikon has released an upgrade to its Capture NX software for digital photography users.

According to the company, the new Capture NX version 1.1 boasts several new improvements including increased performance, full support for Intel-based Mac OS X computers, and optimization for Microsoft's Windows Vista operating system.

In addition to these advancements Nikon has made several usability updates based on software testing and customer feedback.

Capture NX 1.1 now also sports a simpler user interface that has added improvements such as resizable palettes for histograms and curves and levels adjustments.

The software can be used with JPEG and TIFF format images from any source, and its patented U Point technology offers photographers a simplified way to edit their pictures by enabling them to enhance specific areas of a picture electively, without the use of masks, selections, or layers. Capture NX 1.1 also works with Nikon's RAW (NEF) format images, and inherits Nikon's robust RAW processing capabilities for the highest quality results from NEF files.

Available for download immediately the software is free to all current users of Capture NX will be also able to download an update to version 1.1 at no additional cost.

It can also be purchased for an estimated selling price of $149.95 as a full boxed version or downloadable key. A 30-day trial version is available, for new users.

A special limited-time upgrade price of $89.95 will be offered to current owners of Nikon Capture 4 software in the US. The application however is only available online for registered Nikon Capture 4 owners and will be limited to one upgrade per Nikon Capture 4 product key.