About: http://webisa.webdatacommons.org/203030381

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	More so in the good ol' days of film photography, when lenses were mostly made to focus at infinity when hitting a hard stop in the rotation mechanism, adding/removing a front-end filter caused no change in focus.
http://www.w3.org/ns/prov#wasQuotedFrom	cloudynights.com