Gregorian travel telescope with brass tube covered with shagreen.
Micrometric adjustment screw, protective cap.
Primary and secondary mirrors present and in good condition.
In its fishskin covered cardboard case.
Note: The Gregorian telescope is a type of telescope consisting of two mirrors, which was invented in the 17th century by James Gregory, a Scottish mathematician and astronomer. It was first built in 1673 by Robert Hooke.
Dimensions:
- telescope: length of 17,5 cm x diameter of 3,5 c.m
- case: length of 18,5 cm x maximum diameter of 5,5 cm
England circa 1760/1770.
Reference : D ex L1
Price and additional photos on request.
Also discover many more antique telescopes and spyglasses in the dedicated section of our French website : « Télescope, longue vue et lorgnette ».
