Assertion: prism's surface | /r/CapableOf | reduce light transmission
Facets:
value: by 12% to 15%
type: OTHER
Source sentences:
text: Porro-prism binoculars will inherently produce a brighter image than Schmidt-Pechan roof-prism binoculars of the same magnification, objective size, and optical quality, because this roof-prism design employs silvered surfaces that reduce light transmission by 12% to 15%.