Optical Designs

  • Norman Butler
Part of the The Patrick Moore Practical Astronomy Series book series (PATRICKMOORE)


For just about any telescope making project including a binoscope, or binocular telescope, it helps to become very familiar with the telescope’s optical path that light will take through your telescope. This will help you in making the overall design of the binocular telescope or binoscope, especially in terms of the fabrication of the individual telescope parts. The entire overall design of the binocular telescope or binoscope is based on its overall optical focal length, focal ratio, and the size of the primary mirrors or objective lenses. A good idea before you start the construction of your binocular telescope or refractor binoscope is to draw the entire optical focal length diagram to scale on a computer. Using a computer with the appropriate software and a good optical ray trace program can show the position and angles of the mirrors (primary, secondary, and diagonals) including their focal lengths and actual position measurements in the optical system in either inches or millimeters. You can do this either to scale on the computer or draw it out by hand. Either way, you’ll have an optical schematic accurately shown and drawn to scale on a computer to help you construct your binoscope.

Further Reading

  1. APM Telescopes Goebenstrausse 35 66117 Saarbrueceken Germany.
  2. Celestron, 2835 Columbia St., Torrance, CA 90503.
  3. First Light Optics Ltd., Unit 53 Basepoint business Centre, Yeoford Way, Marsh Barton Trading Estate, Exeter, Devon EX2 BLB.;
  4. Jim’s Mobile Incorporated (JMI), 8550 West 14th Avenue, Lakewood, CO 80215.
  5. Moorhouse, D. Dave’s 16 inch binocular telescope page.
  6. Otte, A. Otte binoscopes.
  7. Starizona, 5757 N. Oracle Rd., suite 103, Tucson, Arizona 85704. The Binoscope Company, J. Wyman Court, Corani, NY 11727.
  8. The Bolton Group,
  9. Trott, D. Dave’s 6 inch binocular telescope.

Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Norman Butler
    • 1
  1. 1.TamuningGuam

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