6A70.28 - Binoculars
The specifications on the binoculars are these, 10 Power, 50mm objective lenses, Field of View: 288 ft. at 1000 yds., and Bar Fast Focus.
The optics wonder is just a tubeless binocular that can be folded down for carrying.
- Richard Didsburry, "Binocular Vision - A Simple Demonstration", TPT Vol. 18, #8, Nov. 1980, p. 595, also A Potpourri of Physics Teaching Ideas - Optics and Waves, p. 214.
- Kevin Dupzyk and Tom McLellan, "Binoculars", Popular Mechanics, Vol. 196, #5, July/August 2019, p. 16 - 17.
- T. D. Rossing and C. J. Chiaverina, "4.10, Telescopes and Microscopes", Light Science, Physics and Visual Arts, p. 95.
- The Queen Catalogues Vol. I, Catalogue of Meteorological Instruments, p. 4.
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