Which type of lens allows using multiple focal lengths without changing lenses?

• A. Prime Lens
• B. Micro Lens
• C. Zoom Lens
• D. Tilt-Shift Lens

Answer: (C)

Varying focal length without swapping lenses is what a zoom lens is designed to do. A zoom lens has a built-in range of focal lengths in one barrel, so you can quickly adjust framing and perspective by turning the zoom ring. This lets you go from wide to telephoto views on the same lens, which is ideal when you need flexibility on location. A prime lens stays at one fixed focal length, so changing the look requires swapping lenses. A tilt-shift lens focuses on perspective control and plane-of-focus adjustments rather than changing focal length during a shot. A micro (macro) lens is built for close-up work and magnification, not for providing a continuous range of focal lengths. Therefore, the lens that lets you use multiple focal lengths without changing lenses is the zoom lens.