Assertion: zoom eyepiece | /r/CapableOf | offer range
Facets:
value: from 8mm to 24mm
type: OTHER
Source sentences:
text: In the past these often gave a performance inferior to individual eyepieces but with the advent of new types of glass and modern designs they can give good results albeit at a price; commonly used zoom eyepieces offer the user a range from 8mm to 24mm though others are available.