Ramsden Eyepiece Lens Refraction Diagram

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“If the real image produced by the objective coincides with the collective lens, only the inclination of the principal rays is altered. The lens nearer to the eye is distant from it about its focal length. The eye—lens converts diverging pencils into parallels. Both lenses together form the exit pupil of the objective behind the eye—lens.” —Encyclopaedia Britannica, 1910


Encyclopaedia Britannica (11th ed., vol. 18) (New York, NY: The Encyclopaedia Britannica Company, 1910)


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