"zoom lens"的定义和意义

What is a "zoom lens"?

A zoom lens is a versatile camera lens that allows for adjustable focal lengths, enabling the photographer to zoom in or out and change the magnification of the image without changing lenses. This flexibility makes it possible to capture a variety of scenes and subjects from different distances, from wide landscapes to detailed close-ups, all with a single lens. Zoom lenses are popular for their convenience and adaptability in both professional and casual photography.