What is "talyrond"

Talyrond is a registered trademark of Taylor-Hobson Limited. Talyrond instruments comply with ANSI-B 3.12 1975 and can measure less than one-millionth of an inch. When required, the calibration can be documented in the form of a polar chart recording.

Taylor-Hobson was founded by William Taylor with his brother in Leicester in 1886 this was originally a lens making company. He was responsible for developing the world's highest quality cinema lenses which helped to develop the film industry in the early twentieth century. As they began to manufacture more accurate lenses, they realised they needed instruments that would measure the perfection of each lens.