History of Photography: Niépce's 8-Hour Exposure to Digital

Eight Hours of Sunlight to Make One Image

In 1826 or 1827 — the precise date is uncertain — Joseph Nicéphore Niépce pointed a camera obscura out the upstairs window of his estate at Le Gras in Burgundy, France, and exposed a pewter plate coated with bitumen of Judea to light for approximately eight hours. The resulting image, View from the Window at Le Gras, shows the rooftops and courtyard visible from that window, with buildings illuminated on both the left and right sides because the sun had moved across the sky during the exposure. The image is the earliest surviving photograph. It now resides at the Harry Ransom Center at the University of Texas at Austin, requires specialized lighting to see, and measures just 16.2 cm × 20.3 cm. Photography began not with a click but with most of a working day.

Daguerre and the Public Announcement

Louis Daguerre, a French artist and showman known for his theatrical dioramas, partnered with Niépce in 1829 to develop practical photography. Niépce died in 1833 before the partnership bore public fruit. Daguerre continued experimenting and discovered that exposing a silver-coated copper plate to iodine vapor created a light-sensitive surface, and that brief exposure followed by mercury vapor development could create detailed images in 20–30 minutes rather than hours.

On January 7, 1839, the French Academy of Sciences announced the daguerreotype process to the world. The French government purchased the rights and released the process into the public domain on August 19, 1839 — a date commemorated annually as World Photography Day. The announcement triggered an immediate global response. The Parisian journal L'Artiste reported that within days of the announcement, "everyone wanted to make daguerreotypes." Daguerre's manual sold over 9,000 copies in its first month.

• Hippolyte Bayard, a French civil servant, independently invented a paper-based photographic process in early 1839. Suppressed by the French government to protect the daguerreotype announcement, he staged the first known photographic self-portrait as a staged "drowned man," an early act of artistic protest.
• William Henry Fox Talbot in England announced the calotype (talbotype) process in February 1841, introducing negatives that could produce multiple positive prints — a fundamental advantage the daguerreotype's single unique image lacked.

The Wet Plate Era and Industrial Photography

Frederick Scott Archer's collodion wet plate process, published in 1851, combined the daguerreotype's sharpness with the calotype's print-making capability. Glass plates coated with collodion (gun cotton dissolved in ether) and silver salts had to be prepared, exposed, and developed within 10–12 minutes before the collodion dried — photographers carried darkrooms in wagons or tents to outdoor locations.

Mathew Brady deployed wet plate photography at scale during the American Civil War (1861–1865), sending teams of photographers including Alexander Gardner and Timothy O'Sullivan to battlefields. Brady spent over $100,000 funding war photography — the equivalent of over $3 million today — anticipating that the government would purchase his archive. Congress declined. Brady died near destitute in 1896. His archive, eventually acquired by the government for $25,000, remains among the most significant photographic collections in American history.

Kodak and the Democratization of Photography

George Eastman founded the Eastman Kodak Company and introduced the first Kodak camera in 1888, preloaded with enough flexible film for 100 exposures. The owner sent the entire camera to Rochester, New York, where Kodak developed the film, printed the photographs, reloaded the camera, and returned everything to the customer for $10. The advertising slogan was direct: "You press the button, we do the rest." For the first time, making photographs required no technical knowledge.

The Kodak Brownie, introduced in February 1900 at a price of $1 (film cost $0.15 per roll), brought photography to every economic stratum. A dollar in 1900 is approximately $38 in 2024. Eastman deliberately set the price below cost to build the film market. By 1900, Kodak controlled 90% of the American film market. The Brownie sold 100,000 units in its first year.

• Edwin Land introduced the Polaroid Model 95 on November 26, 1948 — the first instant camera, producing a developed photograph in 60 seconds. Land demonstrated it at the Optical Society of America. The Model 95 sold out its initial production run before Christmas 1948.
• Kodachrome color slide film, introduced in 1935, produced images of such archival stability that NASA used Kodachrome for Apollo mission photography. Paul Simon memorialized the film in his 1973 song. Kodak discontinued Kodachrome in 2009 after the last processing lab closed.

The CCD and Digital Photography

The charge-coupled device (CCD) was invented by Willard Boyle and George E. Smith at Bell Labs on October 17, 1969 — the same year as the Apollo 11 moon landing. A CCD converts photons into electrical charges that can be read out as digital values, functioning as an electronic film. Boyle and Smith received the Nobel Prize in Physics in 2009 for the invention.

Steven Sasson, an Eastman Kodak engineer, built the first self-contained digital camera in 1975, using a CCD image sensor, a cassette tape for storage, and a television screen for display. The camera weighed 3.6 kilograms, took 23 seconds to record a single 0.01-megapixel (10,000 pixel) image to tape, and another 23 seconds to display it. Kodak management showed little interest in the technology, concerned it would cannibalize film sales — a strategic error that led directly to Kodak's 2012 bankruptcy filing.

Consumer digital cameras reached mass-market viability with the Casio QV-10 in 1994, featuring a 25,000-pixel sensor and an LCD preview screen. By 2000, digital cameras outsold film cameras in Japan. Smartphone cameras displaced dedicated digital cameras from 2011 onward: Apple's iPhone 4 introduced a 5-megapixel sensor capable of 720p video in 2010. By 2023, an estimated 1.4 trillion photographs are taken annually — more than in the entire 150 years before the digital era combined.