Giuseppe Campani

[3] His brother, Matteo Campani-Alimenis, and he were experts in grinding and polishing lenses, especially for very long focal length aerial telescope objectives.

Cassini called his attention to the spots on Jupiter, and he disputed with Eustachio Divini, an Italian optician, the priority of their discovery.

Giovanni Domenico Cassini intorno alle ombre delle stelle Medicee nel volto di Giove, ed altri nuovi fenomeni celesti scoperti co' suoi occhiali (Rome, 1666).

Campani's entire workshop was donated to the Gabinetto di Fisica of the Academy of Sciences of Bologna Institute in 1747.

A 10 feet (3.0 m) telescope by Campani was tested in 1871 and was found to provide good definition and a flat field, with a magnification of about 20 times.

Ragguaglio di due nuove osservazioni una celeste in ordine alla stella di Saturno; e terrestre l'altra in ordine a gl'istrumenti medesimi, co' quali s'e fatta l'una e l'altra osservazione , 1664