Assertion: eyepiece's inch | /r/HasProperty | 23 mm
Facets:
Source sentences:
text: Generally, microscope eyepieces are 0.9 inches (23 mm) or 1.18 inches (30 mm) in diameter, while those in telescopes may be 0.96 inches (24.5 mm), 1.25 inches (31.75 mm) or 2 inches (50.8 mm) in diameter.