A zoom lens is a versatile tool in photography that allows the photographer to adjust the focal length electronically or mechanically, providing a range of magnification options without the need to change lenses. This flexibility is especially useful in scenarios where changing physical distance with a fixed lens isn't possible or practical. Zoom lenses are commonly used in various genres of photography, including portrait, landscape, sports, wildlife and product photography, providing photographers with the convenience of adjusting their composition quickly. They offer a range of focal lengths within a single lens, from wide-angle to telephoto, enabling photographers to capture a variety of perspectives with convenience and efficiency.