A ring flash is a type of lighting equipment used in photography, particularly for macro and close-up shots. It consists of a circular light source that attaches to the front of a camera lens, providing even illumination around the subject. This helps to reduce harsh shadows and highlights, making it ideal for capturing fine details in small objects, such as flowers or insects. Ring flashes are commonly used by professional photographers, especially in fields like entomology and botany. They can also be beneficial in portrait photography, as they create a unique catchlight in the subject's eyes. Overall, ring flashes enhance image quality by providing consistent and flattering lighting.