F-STOP
    
Meaning of F-STOP in English
	
/ef"stop'/ , n. Photog.
the setting of an adjustable lens aperture, as indicated by an f number.
 Also, f stop .
	
	
	Random House Webster's Unabridged English dictionary.
    	Полный английский словарь Вебстер - Random House .
	2012