You might forget all about setting the right white balance – especially if you shoot in raw, as then you can change it when you process your images later. However, you'll need to get the right white balance in-camera to be able to assess the exposure and colours of your shots and achieve the best results.Your camera's Automatic White Balance setting generally does a pretty good job of capturing colours correctly in most lighting conditions, but it's not infallible.The main situation in which you'll get better results by using one of the manual preset values is when your subject is dominated by a single colour or tone, such as a blue sky, orange sunset or even a large expanse of green grass.