The 'equatorial coude' refracting telescope, Paris Observatory, France - aperture 7.5cm. The tube is 'bent' and light fed to the observer by two mirrors, one in front of the telescope and the
Cassegrain and Coudé focus positions of the optical instrument (e.g.... | Download Scientific Diagram
Cassegrain and Coudé focus positions of the optical instrument (e.g.... | Download Scientific Diagram