About: http://webisa.webdatacommons.org/245256583

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	As a former owner of the Canon 50mm/f1.8 lens, and a current owner of the Canon 50mm/f1.4 lens, I can say the most noticeable difference between the two is build quality.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com