About: http://webisa.webdatacommons.org/113351029

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	Photography is a highly competitive commercial business and both weight and cost constrain the production of lenses.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org