On this day: April 16

Published On: Apr 15 2013 11:35:29 AM CDT   Updated On: Apr 16 2016 01:00:00 AM CDT

LSD's creator drops acid (accidentally) for the first time, Martin Luther King writes his "Letter from Birmingham Jail," The Rolling Stones release their debut album, and tragedy strikes Virginia Tech, all on this day.

OTD April 16 - Zoomar lens
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Public domain

1947: The Zoomar lens, the first zoom lens for the television camera, is demonstrated by the National Broadcasting Company during a baseball game in New York City. Previously, moving into a closeup shot or backing out for a wide angle shot on a TV broadcast required moving the entire camera. The lens would be patented as a "varifocal lens for cameras" by its inventor, Frank Gerard Back, on Nov. 23, 1948.

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