F-STOP
    
Meaning of F-STOP in English
	
transcription, транскрипция: [ ˈef-ˌstäp ]
noun
Date: 1946
: a camera lens aperture setting indicated by an f-number
	
	
	Merriam-Webster's Collegiate English vocabulary.
    	Энциклопедический словарь английского языка Merriam Webster.
	2003