Here is a list of the largest optical refracting telescopes sorted by lens diameter and focal length.The largest practical functioning refracting telescope is the Yerkes Observatory 40 inch (102 cm) refractor, used for astronomical and scientific observation for over a century.Most are classical Great refractors, which used achromatic doublets on an equatorial mount.
| Attributes | Values |
|---|---|
| rdfs:comment |
|
| foaf:depiction | |
| thumbnail | |
| is rdfs:seeAlso of |