UNDERSTAND WHAT THE HISTOGRAM TELLS YOU

You’ll see histograms everywhere, from your camera’s Live View display to editing programs like Lightroom. These graphs show you the exposure information of your shot: if it’s bunched up towards the left, it means your shot is underexposed and some of the tones have burnt out to pure black; if it’s bunched up on the right it means you’ve lost some detail in your highlights as the shot is overexposed. An even graph with no bunched-up tones on the left or right means you have a balanced exposure.