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Largest refracting telescope

Largest refracting telescope
Who
Yerkes Observatory
Where
United States (Yerkes Observatory,Wisconsin)
When
1897
The largest refracting telescope, which uses a lens instead of a mirror to gather and focus light, is at the Yerkes Observatory in Wisconsin, USA. Built in 1897, it has a primary lens diameter of 1.02 m (3 ft 4 in).