Odds and Ends

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


Homemade binoscopes or binocular telescopes (as we know them today) have been around since the late 1920s, when Mr. Hilmer Hanson of Holdrege, Nebraska (one of the earliest pioneers of binocular telescopes), had his original homemade Newtonian binocular telescope introduced in Amateur Telescope Making Vol. 1 in 1931. Most if not all of the big binocular telescopes that we see today that are being built by some pretty clever amateur telescope makers can, in fact, trace their initial binocular tele-scope design or sometimes called Binocular Telescope’s DNA all the way back to Mr. Hanson’s original homemade binocular telescope that he made back in the 1920s. Mr. Hanson even ground and polished his own 6-in. mirrors, and considering the amount of materials he had available to him at the time, it was no small feat. When compared to his humble 6-in. f/8 binocular telescope (see Fig. 7.1), one can see little difference in the design of binocular telescopes that the amateurs are making today, at least when it comes to the smaller Newtonian-sized Newtonian binocular telescopes.

Further Reading


  1. Amateur Telescope Making, Vol. 1 (1931).Google Scholar
  2. Astronomy Technology Today (monthly periodical) 1374 North West Dr. Stafford, MO 65757. – Huygens (4, 10).
  3. Eyepiece Evolution, Brayebrook Observatory.orgGoogle Scholar
  4. Harrington, P. S. Star Ware, pp. 181, 183, (3, 8).Google Scholar
  5. Nagler, A. United States Patent US4286844.Google Scholar
  6. Nagler, A. United States Patent US4747675.Google Scholar
  7. Nagler, A. United States Patent US4525035.Google Scholar
  8. Nagler, A. Finder scope for use with astronomical telescopes. Nagler. TeleVue: A historical perspective.Google Scholar
  9. Scientific American.
  10. Stellafane, 1980 Convention. Norm Fredrick, Springfield Telescope Makers.
  11. Wikimedia Commons.


  1. Acmite Market Intelligence. Market report: Global optical coatings market.Google Scholar
  2. Clark, et al. (2001). Two-color Mach 3 IR coating for TAMD systems. In Proceedings of the SPIE (Vol. 4375, pp. 307–314).Google Scholar
  3. Hecht, E. (1990). Chapter 9: Optics (2nd ed.). Addison Wesley. ISBN 0-201- 11609-X.Google Scholar
  4. MIT researchers create a ‘perfect mirror’. MIT press release. 26 Nov 1998. Retrieved 17 Jan 2007. Moreno, et al. (2005). Thin-film spatial filters. Optics Letters, 30, 914–916.Google Scholar
  5. Thin-film spatial filters, (PDF). Retrieved 30 May 2007. Wikimedia Commons.

References for Optical Coatings

  1. Wikipedia Commons, (1) (2) (4)

Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Norman Butler
    • 1
  1. 1.TamuningGuam

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