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He was regarded as an explosives expert and was involved in the development of the technology used to trigger the mortar using a photographic flashgun.

And using the flashgun methods of illuminating nighttime shots, Riis also set at least three fires, according to the current Library of Congress exhibition “Jacob Riis: Revealing ‘How the Other Half Lives.’

It’s worth noting that the G7X Mark II has no hotshoe to allow you to attach external accessories, such as a flashgun.

As you’d expect at this level there’s a built-in flash but alas no hotshoe for attaching a more powerful external flashgun.

"I chose the East side simply because so many photographers were on the West side, flashguns blazing," says Eason.