Assertion: eyepiece | /r/HasProperty | good quality
Facets:
value: generally
type: DEGREE
value: very
type: DEGREE
Source sentences:
text: As mentioned in a previous section, eyepieces with H markings (Huygens optical configuration) are generally of not very good quality (the image will tend to be blurry around the perimeter of the field of view) and the apparent fields of view are on the smaller side.