Assertion: eyepiece's inch | /r/HasProperty | 24.5 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.
text: The barrels of all modern astronomical eyepieces manufactured in the United States have either a 1.25 inch (31.5 mm) or 2 inch (50.5 mm) nominal exterior diameter; many older eyepieces some eyepieces manufactured in Japan have a 0.965 inch (24.5 mm) nominal diameter.