Concave lens use – Galileo's telescope
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A Galilean telescope is defined as having one convex lens and one concave lens, vintage line drawing or engraving illustration Stock Vector Image & Art - Alamy
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optics - How does a Galilean telescope form an enlarged image even though it has a diverging lens? - Physics Stack Exchange
Refracting telescope - Wikipedia
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Are Keplerian vs Galilean Telescopes Usually Smaller - Best telescopes guide - Medium
Secrets of the Telescope History | A Path for Future Astronomers｜Subaru Kids｜Subaru Telescope
File:GalileanTelescope.png - Wikimedia Commons
Refractive Telescopes
Light path of a Galilean telescope | ESO Supernova
Making a Galilean Telescope
Galileo's Refracting Telescope | Multiwavelength Astronomy
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Amazon.com: Eschenbach 3X Binocular Galilean Telescope - Close Up Viewing : Health & Household
Beam Expander Design Comparison: Keplerian and Galilean
Refractive Telescopes
NOVA | Galileo's Battle for the Heavens | Two Types of Telescopes | PBS
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Galilean Telescope
Refracting telescope - Wikipedia
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Galileo and the telescope – Explaining Science
Galileo's telescope - How it works
History of Science Society -- Committee on Education
12: Virtual Telescope I: Galilean
