Assertion: eyepiece | /r/HasProperty | ~7 degrees
Facets:
value: at ƒ/10
type: LOCATION
value: at 1/4 of the entire field
type: LOCATION
value: in radius
type: OTHER
Source sentences:
text: eyepiece, diffraction limited field set by the astigmatism is ~7 degrees in radius at ƒ/10, or roughly 1/4 of the entire field.