Refracting Telescope

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“The most simple refracting telescope consists of a tube, containing two convex lenses, the one having a long, and the other a short, focal distance.” -Comstock 1850


J. L. Comstock A System of Natural Philosophy: Principles of Mechanics (: Pratt, Woodford, and Company, 1850) 253


TIFF (full resolution)

2400×527, 128.9 KiB

Large GIF

1024×224, 23.3 KiB

Medium GIF

640×140, 12.5 KiB

Small GIF

320×70, 5.0 KiB