A graduated neutral density filter is a photography tool that helps balance exposure in scenes with varying light levels. It is typically darker at the top and gradually becomes clear towards the bottom, allowing photographers to reduce the brightness of the sky while keeping the foreground properly exposed. This is especially useful in landscape photography, where the sky can be much brighter than the land. These filters come in various strengths and sizes, fitting different lenses. They can be made from glass or resin and are often used in conjunction with other filters or camera settings. Using a graduated neutral density filter can enhance the overall quality of images by preventing overexposure in bright areas, such as the sky, while maintaining detail in darker areas like landscapes.