Lighting Gear Pioneer Paul C. Buff Passes Away at the Age of 78

The world of photography lost one of its own this week. Photographic lighting pioneer Paul C. Buff has passed away at the age of 78. Among his many contributions to photography were White Lightning, AlienBees, Einstein flash units; the CyberSync radio remote system; and the Vagabond power system.

The Only Known Photograph of Einstein Deriving his Famous E=mc2 Equation

At a public lecture in Pittsburgh in 1934, four hundred lucky students were privy to a lecture by Albert Einstein, in which the great man mathematically derived his famous mass-energy equivalence equation: E=mc2. What you see above is a photo from that lecture, and what is thought to be the only surviving photo that shows Einstein working on that derivation.