click this to translate "sharp focus" by computers
focus
Noun: focus (foci,focuses) fowkus The concentration of attention or energy on something "the focus of activity shifted to molecular biology" - focusing ...
focus on
Verb: focus on Centre upon - center on [US], revolve around , revolve about , concentrate on , center [US], centre on [Brit, Cdn], centre [Brit, Cdn]...
in focus
Placed or adjusted so as to secure distinct vision, or a sharp, definite image; [American slang] 1. Lit. [of an image] seen clearly and sharply. (Typically: be ~; come [into] ~; get [...
sharp
Adjective: sharp (sharper,sharpest) shaa(r)p (of something seen or heard) clearly defined "a sharp photographic image"; "the sharp crack of a twig"...
come into focus
[American slang] Go to in focus
depth of focus
The distance between a camera lens and the film at which the image will be clear
dynamic focus
[Electronics] Compensation for defocusing, caused by the electron beam sweeping in an arc across a flat color picture-tube screen; the method uses an alternating-current (ac) focusing-elec...
flange focus
[Electronics] The focal length of a lens, based on the distance from the mounting flange to the focal plane.
focus coil
[Electronics] See FOCUSING COIL.
focus control
[Electronics] In an oscilloscope or television circuit, the potentiometer that controls the voltage on the focusing electrode of the cathode-ray tube and, accordingly, the sharpness of the...
