Amazon.com : Galileo 800mm x 80mm Astronomical Telescope Kit with Zoom Lens : Electronics
Galileo and the telescope – Explaining Science
Galileo Galilei, Objective lens
Galileo's objective lens - Wikipedia
The sidereal messenger of Galileo Galilei : and a part of the preface to Kepler's Dioptrics containing the original account of Galileo's astronomical discoveries . GALILEOS BROKEN LENS. EXHIBITED IN THE LOAN