Over-Exposure and Midday Sun
Midday sun is the type of light every photographer fears. It is avoided most often as it creates very harsh and contrasty images. But there are times when a photographer simply cannot avoid shooting in harsh midday sunlight. The photographer must make a decision which parts of the image to sacrifice to over-exposure and which elements need to expose correctly to reveal a pleasing image.
The most important thing for a photographer to remember is to keep an eye on the important elements and try their best to ignore the rest. Here is an example where I had to capture some pre-ceremony photos of the bride in harsh sunlight in the Kalahari and I decided the her face was first priority and dress second. There are parts of this images which are completely over-exposed, but in the end the important parts are what matter.