A variable focus lens, also known as a zoom lens, is a lens whose focal length can be continually adjusted within a specific range. This allows photographers to change the magnification of their subject without swapping lenses.
Photographers use variable focus lenses for versatility in framing, composition, and perspective, making them ideal for events, wildlife, and travel photography. Understanding how to effectively use a zoom lens ensures sharp, well-composed images across a variety of shooting situations.