About: http://webisa.webdatacommons.org/253213381

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	Because in the case of both Nikon and Canon, the mk1 versions are good enough for many different kinds of work, while others will indeed ???demand??? that you upgrade to the mk2.
http://www.w3.org/ns/prov#wasQuotedFrom	slrlounge.com