Stock Photo: The Yerkes Observatory 40 inch (102 cm) refracting telescope is the largest refracting telescope used for scientfic research, built in 1893. It is at the practical limit for refractors as the weight of the lens itself causes distortions.

4366-207 Rights Managed
Category: Science
scf4863-012
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  • 17.9" x 11.93"
  • 300 dpi
  • 54.97MB
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