About: http://webisa.webdatacommons.org/165367205

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	If the target is a bright object such as the moon, a sufficient distance shows clearly the outline of the exit pupil in the center of the eyepiece eye lens; it will appear out of focus if it is closer than about 25 cm to the eye.
http://www.w3.org/ns/prov#wasQuotedFrom	handprint.com