Adolf Repsold

Collaborations with Carl August Steinheil led to several innovations including a measuring graticule within the eyepiece.

Repsold's instruments were widely in use in astronomical observatories across Europe and included the Oxford Heliometer.

A universal (theodolite) instrument made by Repsold was used in the geodetic surveys of Friedrich Georg Wilhelm Struve.

[1][2] Repsold made his son Johann Adolf (also known as Hans) a partner in 1858.

Repsold left the company in 1867 to his sons Johann Adolf and Oscar.

Meridian circle at the Quito Astronomical Observatory . Built by Repsold and sons, 1889.