Assertion: eyepiece | /r/HasAspect | lens
Facets:
Source sentences:
text: Of course, the bundles of rays from other stars in the field of view will go through different 1 mm hunks -- that's why the eyepiece has lenses that are more than 1 mm wide -- and for a good eyepiece, the aberrations in each individual 1 mm hunk must be small.