Understanding Camera Zoom

Zoom describes how a lens changes the framing of a subject. Understanding the difference between optical and digital zoom helps you choose equipment wisely.

Optical Zoom

Optical zoom changes the lens's focal length, allowing you to frame a distant subject without simply enlarging the recorded image.

Digital Zoom

Digital zoom enlarges or crops the image electronically. Depending on the camera and processing, this can reduce the detail available in the final image.

What Should Beginners Check?

Look at the lens's focal-length range, maximum aperture, stabilization features and the type of subjects you plan to photograph.