Assertion: telescope's image | /r/HasProperty | viewed
Facets:
value: from back of the scope
type: OTHER
value: from the top
type: OTHER
Source sentences:
text: Most terrestrial scopes are prismatic, meaning that the image is viewed from the top or back of the scope.
text: One use of a tube is to prevent light from falling upon the mirror, which in some designs can decrease contrast in the image being viewed.