focal distance

Variant of focal length

focal length definition

focal length

the distance from the optical center of a lens or curved mirror to the point where light rays from a very distant object converge
also focal distance

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.