Share this entry
back focus Syllabification: back fo·cus

Definition of back focus in English:


The distance between the back of a lens and the image of an object at infinity.
Example sentences
  • If the focal length is positive and the back focus B is longer than the focal length, the result is a reversed telephoto, or retrofocus.
Definition of back focus in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove ads and access premium resources