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Refracting telescope. Refracting telescope The Galilean telescope The objective lens, whose focal length is f, performs the same function. - ppt video online download
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Comparison of Galilean and Keplerian telescopes. - American Academy of Ophthalmology
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Understanding “Galilean” vs. “Keplerian” and “Wide Angle” vs. “Expanded Field” telescopes – Dr Henry Greene
History of Science Society -- Committee on Education
Simplified schematic of a Keplerian telescope with two convex lenses,... | Download Scientific Diagram
