They're still pretty rudimentary, but you can now top and tail a video in Lightroom and you can apply adjustments to your clips in the same way as still images. The other big deal is the improvement to the video tools.

With it you can tweak small areas of your image to change the exposure, contrast or - perhaps most usefully – the white balance, which will save you having blue faces against a yellow background if you're shooting with a slow shutter sync. The adjustment brush has been made more powerful.

You'll have to play with them to get used to their effects, but taking pot luck with clicking Auto on the Tone button seems to produce better results first time than before. Previous versions gave you Exposure, Recovery, Fill Light and Blacks the new algorithm gives you Highlights, Shadows, Whites and Blacks. However, the benefit of this new algorithm is that you get new sliders to play with when working with pictures in LR4. The new algorithm seems to brighten and up the contrast when applied to images processed under the old algorithm, PV2010. My suggestion, after playing with it, is to leave your old images alone if you were happy with them before. It's up to you whether or not you do that.

What this means in practice is that first, when you open images you processed in earlier versions of Lightroom, you'll be asked if you want to upgrade them to the new process. The most important change is the switch to a new processing algorithm, PV2012. Lightroom has been evolving through its releases and this new version has a couple of significant changes plus a couple of nice-to-have but by no means vital additions. I'm not a professional photographer, but I take a lot of pictures and with the best will in the world – and the best camera in the world – no image is going to be perfect at the moment of capture.

Adobe lightroom review 2015