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Big Old Lenses - Objectivity #51

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Published on Jan 5, 2016

Brady and Keith look at three aerial telescope lenses - built in the 17th Century by Christiaan and Constantine Huygens.

Films by James Hennessy and Brady Haran

Royal Society website: http://bit.ly/Royal_Society

The Royal Society's own YouTube channel: https://www.youtube.com/user/RoyalSoc...

Facebook: https://www.facebook.com/ObjectivityV...
Twitter: https://twitter.com/objectivity_vid

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