focusn.The sharpness of an image created by an optical system.The plane where an optical system causes light rays parallel to the system's axis to converge.A concentration.v.To adjust an optical system so that the image is sharp.
NotesFocus1 is perceived in terms of sharp, distinct lines and high contrast. Focus is relative to the optical system; distortion in the system may degrade focus.
Word of the Weeksubscribe
Terms trending now...