An optical zoom accomplishes magnification by which means?

• A. Digital zoom magnifies the image by interpolation
• B. Crops the image to magnify distant subjects
• C. Changes the field of view automatically with digital processing
• D. Uses the physical principles of optics to make your subject appear closer to the camera

Answer: (D)

Optical zoom relies on changing the focal length of the lens to magnify the scene. By adjusting the lens elements, the camera projects a larger image of the subject onto the sensor, making it appear closer without adding pixels or altering the image after capture. This preserves image detail because no digital enlargement or cropping is involved.

Digital zoom or cropping methods, on the other hand, rely on software or sensor-area manipulation after the shot, which simply enlarges or crops the image and often reduces final quality. The option that describes changing the field of view with digital processing isn’t optical zoom—it’s a digital effect applied after capture. So using the lens’s physical optics to bring the subject closer is exactly what optical zoom does.