Today, we snap a photo in a fraction of a second and share it before we've even put the phone away. So it's startling to hear that the world's oldest surviving photograph supposedly took eight full hours to make. That's the figure you'll find in many books and trivia lists.
The real answer is a bit more surprising. The famous eight-hour figure is a traditional estimate, based on the way sunlight seems to strike buildings on opposite sides of the scene. But a modern researcher who studied the inventor's notes and recreated his process concluded that the exposure must have gone on for several days. Either way, it was a very long wait.
The View From the Window
The picture is called View from the Window at Le Gras. It was made by French inventor Nicéphore Niépce between June and July of 1827 at his country estate in Saint-Loup-de-Varennes, France. It shows rooftops, buildings, and countryside as seen from a high window.
The original plate is notoriously hard to see clearly, and even making a good copy of it proved extremely difficult. But it's still a landmark. In 2003, Life magazine included it among its 100 Photographs that Changed the World.
Painting With Asphalt
Niépce's process, which he called heliography, didn't use film at all. He coated a pewter plate, about 6 by 8 inches, with a thin layer of bitumen of Judea, a naturally occurring kind of asphalt. Then he placed it inside a camera obscura, a box that projects an image of the outside world.
Wherever bright light hit the plate, the bitumen hardened. In the dimmer areas, it stayed soft. Afterward, Niépce washed the plate with a mixture of lavender oil and white petroleum, which removed the soft bitumen and left the image behind.
The process needed an extremely long exposure. That's why sunlight seems to hit buildings on opposite sides of the picture: the sun moved across the sky while the plate was still taking in the scene.
Lost and Found
The photograph had quite a journey. In 1827, Niépce visited England and tried to present his process to the Royal Society, but he refused to reveal the details, so his paper was rejected. He left the plate with botanical illustrator Francis Bauer, who later championed Niépce as the true inventor of photography.
After being shown for the last time in 1905, the plate vanished from public view for 47 years. Historians Helmut and Alison Gernsheim tracked it down in 1952. Today it rests in a sealed, oxygen-free display case at the Harry Ransom Center at the University of Texas at Austin.
From Days to Minutes
Photography sped up quickly after that. By 1838, Louis Daguerre had developed a method that cut exposure time to only four or five minutes. One of his early pictures, Boulevard du Temple, shows a Paris street that would have been bustling with people and horses. Yet it looks almost empty, because moving figures didn't stay still long enough to register.
Only two figures show up, holding still in one spot: what appears to be a bootblack and his customer, though some have suggested the bootblack may actually be a water pump. It's widely considered the earliest surviving photograph to include a human. So next time you snap a quick selfie, remember those patient pioneers.
