At first we were skeptical and not sure whether to upgrade the Lighroom 2.7 worth the 3 version. In addition to the lens correction as well as other functions are improved. Very striking here is the improved noise reduction. It can not be measured with a plugin like Nik Define itself, but is a big step forward from the old version. In the age of high isovalues and avalible light photography such a function is becoming increasingly important. For all those who are already problems with the speed of your PC - be careful! Lightroom 3 reduced the pace noticeably. It should therefore have a really official PC be available for professional image editing.