Exposure in photography refers to the amount of light that reaches a camera's light-sensitive material, such as film, photographic paper, or a digital sensor (CCD/CMOS). It determines how bright or dark an image will appear and is primarily controlled by two key settings: shutter speed, which regulates the duration of light exposure, and aperture, which controls the intensity of light entering the lens. Proper exposure is essential for capturing detail in both shadows and highlights, and it significantly affects the overall mood and quality of a photograph.
Photographers adjust exposure not only for correct brightness but also for creative effects, such as motion blur, depth of field, and contrast. Tools like light meters, histograms, and exposure compensation help ensure accurate exposure in various lighting conditions. Understanding and mastering exposure is fundamental to achieving technically sound and visually compelling images across all types of photography.