About: http://webisa.webdatacommons.org/68586500

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	It is desirable that the surfaces giving the multiple image and blur as in the foregoing are each arranged at a position such as not to be so spaced from the stop provided in the objective lens system 7.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk