Because of this, the Troughton & Simms Company became the instrument supplier for the Royal Society. Moreover, they also provided several renowned astronomical telescopes for the Royal Greenwich Observatory, including the first equatorial telescope in history.
As for the Peter Dolonde Optical Instruments Company, this old establishment founded in the 18th century is currently the leader among global optical instrument manufacturers. Their sextants and other nautical instruments are highly trusted by the Royal Navy, and many prominent British astronomers are loyal supporters of their company.
The British astronomer William Herschel, who discovered Uranus, and his son John Herschel particularly favored the products of the Dolonde Company.
Additionally, the legendary cartographer Eld Carter, known for his rigor and seldom praise, once praised the instruments of this company.
