Assertion: lens's stop | /r/HasAspect | severe vignetting
Facets:
value: with these eyepieces
type: OTHER
Source sentences:
text: Also, due to their large field stops, without larger secondary mirrors most reflectors and Schmidt-Cassegrains will have severe vignetting with these eyepieces.
text: Also, due to their large field stops, without larger secondary mirrors most reflectors and Schmidt-Cassegrains will have severe vignetting with these eyepieces.