Largest refracting telescope

According to Official Guinness Records,

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).

For a complete list of 1897 records, please visit 1897 Guinness Records in United States.

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