About: http://webisa.webdatacommons.org/254063592

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	However, the focal plane can only be adjusted by moving the specimen and the optical system relative to each other, i.e. closer to or further away from each other.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com