It was Sunday, 5 June 2016, not June 1866, as Britain’s best-known Leica-retailing duo, Ivor and Elaine Cooper, posed for an ambrotype, successor to the daguerreotype. It is one of the earliest photographic processes, based on the wet-plate collodion system invented by Frederick Scott Archer. They were deliberately underexposed negatives optimised for viewing as positives. I captured the scene as an evanstype through a 25mm Leica DG Summilux attached to a modern PEN-F. Cheating, of course.
The Street Collodian Art exhibit at Biévres was managed by Michał Sitkiewicz and Paweł Sokołowski of the Polsky Insitut, Prague.
Ivor and Elaine can usually be found in full colour at Red Dot Cameras in London.