About: http://webisa.webdatacommons.org/274567683

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	I read about all the various means of determining and setting focus on various types of cameras, focusing aids and how they work, and the issues affecting accuracy and repeatability.
http://www.w3.org/ns/prov#wasQuotedFrom	typepad.com