Assertion: eyepiece | /r/HasAspect | significant competition
Facets:
value: from the 10 mm radian
type: OTHER
Source sentences:
text: This eyepiece now has some significant competition from the 10 mm Radian, which is smaller, lighter, less expensive, and (some say) sharper (Al Nagler disputes this, saying the Naglers are all diffraction limited and are just as sharp as the Radians.)