About: http://webisa.webdatacommons.org/390614508

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	Several options are available for the attachment of external wide angle and macro lenses: Attach 46mm threaded #6420.46 Ikelite W-20 and other lenses directly to the front of the housing port (recommended).
http://www.w3.org/ns/prov#wasQuotedFrom	divebuddy.com