About: http://webisa.webdatacommons.org/24135461

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	you said it yourself.. a stop is double.. in iso, shutter speed and aperture.. from 1/30 to 1/60 there is a stop, fom 1/30 to 1/120 there are two stops.. get it?
http://www.w3.org/ns/prov#wasQuotedFrom	canonrumors.com