Click here

zoom ring

A zoom adjustment ring found on many digital video recorders and digital cameras. Zoom rings enable motorized zoom that allows you to change the focal length in real-time as you shoot. A 4X zoom lens, for example, will enlarge or reduce the subject in an image by four times depending on which way it's zoomed. Zoom lenses are either optical zoom or digital zoom.



Top Terms

Connect with Webopedia

  • What is 250 GB Data Usage?

    What is 250 GB (250 gigabytes) and why is this phrase so popular? Webopedia explains what the phrase 250 GB means in reference to data storage...

    Read More »

Did You Know? Archive »

  • Quick Reference Archive »