About: http://webisa.webdatacommons.org/338087923

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	The long teles were in two pieces, the rear was a focusing unit, then you could order the front focal lengths separately, for example..... a 300mm, 500mm, 600mm, 800mm.
http://www.w3.org/ns/prov#wasQuotedFrom	dpreview.com