About: http://webisa.webdatacommons.org/363141656

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	Although off-axis stigmatic imaging is not possible in this case, there is a surface lying between the S and T surfaces that can be considered to define the positions of best focus".
http://www.w3.org/ns/prov#wasQuotedFrom	toothwalker.org