About: http://webisa.webdatacommons.org/123483305

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 ma really talking about lenses such as my 100mm f2 and 50mm 1.8 where wide open the DOF is so small that accurate focus is critical.
http://www.w3.org/ns/prov#wasQuotedFrom	amazon.co.uk