Kensington Telescope (1884). The Kensington refracting telescope comprises a 10-inch main viewing tube and a camera fitted with an objective prism. The instrument was used to study star spectra leading Sir Norman Lockyer to propose that stars had a life cycle of change. The telescope marks the start of modern astrophysics research.

Christine Matthews on Geograph
See also...
Spudgun67 on Wikimedia Commons