Flare is a common issue in photography that can occur when a bright light source, such as the sun, enters the lens of a camera. This can cause a loss of contrast, color distortion, and even ghosting. There are a number of ways to avoid flare, including:
Using a lens hood: A lens hood is a physical barrier that can be attached to the front of a lens to block out unwanted light. This can be an effective way to reduce flare, especially when shooting in bright conditions.