What Is a Camera Obscura?

A Camera Obscura is essentially a dark box with a tiny hole. Light passes through this hole and projects an inverted image of the outside world onto the opposite surface. This simple principle is the foundation of photography and was already studied by Leonardo da Vinci and Ibn al-Haytham. Later, Joseph Nicéphore Niépce used it to capture the world’s first photograph in 1826.

For a deeper introduction, visit our Camera Obscura guide.

Ready-Made Camera Obscura Models

If you want to start right away, you can buy a variety of Camera Obscura kits and models online. Shops and marketplaces like Etsy – Camera Obscura Kits offer beautifully crafted wooden cameras, ready to use with photo paper. These are perfect for beginners, hobby photographers, or as a creative gift.

DIY Camera Obscura Kits

For children, schools, or anyone who enjoys experimenting, DIY pinhole camera kits are a wonderful option. With a few simple parts, kids can assemble their own pinhole camera and discover how light creates images. It’s not only a creative activity but also a hands-on way to learn about optics.

If you want to take it further, you can replace the tracing paper with photographic paper and experiment with long exposure images. Check out our guide: Build Your Own Camera Obscura – Pinhole Camera Guide.

Which Photo Paper to Choose?

To capture images inside the Camera Obscura, you’ll need light-sensitive photo paper. Black-and-white paper is often the best choice, as it allows for longer exposures and creates magical effects like solargraphy, where the path of the sun is recorded across the sky over weeks or months.

You can learn more about this fascinating technique in our article: soon available

Whether you buy a Camera Obscura or build your own, this simple optical device opens up a world of creativity. It is an excellent educational tool for children, a source of inspiration for artists, and a unique way for photographers to reconnect with the origins of photography.

Good to know: With most camera obscura cameras and DIY kits, the biggest hurdle comes after exposure: developing and digitizing the negative. You need to find a lab, buy chemicals, and scan the image. It takes time and adds extra costs.

With our Participation Set, that work disappears. You expose the photo and send it back. We handle professional development and high-resolution digitizing and deliver the final image to you. Everything is included in the price, no additional costs.

Join now: the-7th-day.de/blog/participate/

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Camera Obscura in Contemporary Art

Artists value the medium’s slowness and serendipity. Weeks- or months-long pinhole exposures produce solargraphs that trace the sun’s path, turning time itself into an image. Our project The 7th Day invites people worldwide to place simple pinhole cameras; returned results become part of a growing archive—a collective artwork about time and light.

Camera Obscura in Education

In classrooms and workshops, building a pinhole camera with simple materials reveals how light forms images. For many young makers it’s a first encounter with analog photography—sparking curiosity and bridging science and art.

The Millennium Camera – Photographing the Next 1,000 Years

A striking contemporary example is artist and experimental philosopher Jonathon Keats’s Millennium Camera: a radically durable pinhole camera that exposes a single image over roughly a millennium to register landscape change.

• In 2015, the ASU Art Museum in Tempe, Arizona, installed a Millennium Camera slated to be unveiled in 3015, aimed at the city skyline to condense a thousand years of urban transformation into one photograph. (news.asu.edu, Atlas Obscura, PetaPixel)
• In 2024, another Millennium Camera was sited in Tucson (Tumamoc Hill) with University of Arizona collaborators. Light passes through a pin-sized hole in 24-karat gold into a copper cylinder, gradually fading layered rose-madder oil pigments to form an image—meant to be opened about a thousand years from now. (University of Arizona News, New Atlas, Smithsonian Magazine)
• Coverage by outlets such as Hyperallergic frames the project as the world’s slowest photograph and a prompt to consider our responsibilities to future generations. (Hyperallergic, aau.edu)

Together, these works show how the camera obscura operates today as art, inquiry, and civic imagination.

Camera Obscura as a Source of Inspiration

Even in the age of smartphones, the camera obscura reminds us that photography exceeds technique. It’s an exploration of light, time, and perception—from art history and creative projects to playful experiments for kids.

For further context on ultra-long exposures and what’s been achieved to date, see documented records of years-long pinhole photographs. (National Geographic, My Modern Met)

Art Project “Camera Obscura 2005/1–∞”
A compelling net-art initiative is Camera Obscura 2005/1–∞, launched in 2005 by Przemek Zajfert and Burkhard Walter and dedicated to Roman Opałka. It uses a twin-pinhole camera: each week the two “holes” were auctioned on eBay; the highest bidders received the same camera loaded with 5×7-inch film, pierced their pinhole with a supplied needle, made an exposure, and passed the camera on. Because the two openings are very close together, the two exposures partially overlap, forming a joint image created by people in different places—a global puzzle of parallel exposures. The series is documented online and intended for physical display as well. Project site: http://www.camera-obscura-1-inf.net.

Möchtest du, dass ich die beiden Absätze direkt in deinen zweisprachigen Blogtext einbaue (inkl. Zwischenüberschrift und internen Links)?

Far from obsolete, the camera obscura bridges past and present. Its simplicity makes it accessible; its results continue to surprise. And with visionary efforts like the Millennium Camera, the medium looks boldly toward the year 3015 and beyond. (Hyperallergic)

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The human eye

In the eye, the eyeball acts as the chamber, the pupil regulates the amount of light, and the retina serves as the projection surface. Similarly, the Camera Obscura allows light through a pinhole into a lightproof box, where it forms an image on the back wall or on photosensitive paper. In both cases, the image appears inverted and mirrored – a phenomenon that puzzled scientists for centuries until the Camera Obscura made the mechanics visible.

The Camera Obscura

The differences, however, are significant. Unlike the simple pinhole of the Camera Obscura, the eye has a lens that continuously focuses and adjusts, providing sharp and detailed vision. Moreover, the eye does not merely project light; it translates it into electrical signals, which the brain interprets into coherent images. The Camera Obscura, by contrast, shows a direct, unprocessed projection – an optical truth untouched by interpretation.

This comparison was revolutionary in the history of science. The Camera Obscura demonstrated that the image on the retina is indeed inverted, and that it is the brain’s task to correct and interpret it. It bridged the gap between optics and biology, offering a tangible model for understanding how we see.

Today, the Camera Obscura is more than a scientific analogy. In art projects like The 7th Day, the same principle is used to capture long exposures that reveal traces of time and light invisible to the human eye. While our eyes capture the present moment, the Camera Obscura preserves the continuum of time, offering us a vision that goes beyond natural perception.

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After several days of exposure, an image slowly appeared: the outlines of a house, rooftops, and trees – inverted and in negative tones. This was the first photograph in the world. But Niépce faced a problem: without a fixing process, the paper continued to darken when exposed to light, and the image eventually vanished. He called this early method “Retina”, inspired by the human eye.

A few years later, Niépce made a breakthrough with bitumen of Judea applied to a pewter plate. In 1826 or 1827, he created the first permanent photograph, famously known as the View from the Window at Le Gras. This image is considered the true starting point of the history of photography. You can read more in our article On the Trail of Joseph Nicéphore Niépce.

From Historical Experiment to Contemporary Art

The Camera Obscura has never lost its magic. In our project The 7th Day, we build simple pinhole cameras and use long exposure photography to capture not just a moment, but the passage of time. Just like in Niépce’s early experiments, still objects remain sharp, while the movement of the sun, clouds, or people leaves only traces or ghostly shadows.

The world’s first photograph was not only the beginning of a technological revolution, but also an artistic reflection on transience and the way we perceive reality.

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The Seventh Day: Silver, Lavender, Asphalt, Sun and Time

Why restraint makes you creative and free

What happens when, instead of taking one thousand snapshots, you make just one image and expose it for days, weeks, or even months? The artist and photographer Przemek Zajfert shows in his TEDx Talk how radical reduction, a pinhole camera, light, and a lot of patience lead to surprising freedom. His project The 7th Day is a poetic invitation to rediscover time as a design material.

What the talk is about

In the talk, Przemek Zajfert speaks about a simple, almost magical tool, the Camera Obscura. A light tight can, a tiny hole, a light sensitive sheet of paper, that is all you need. No lens, no display, no autofocus. Instead of snapping in milliseconds, you let the world act on it for a long time, hours, days, sometimes months. The result is not the crisp moment we know from smartphones but a condensation of time. In the images, the paths of the sun appear as arcs, changes in the weather weave textures into the sky, and even small coincidences, spider silk, pollen, raindrops, become co authors.

This attitude, less technology, more attention, is the core of The 7th Day. People around the world mount their home made pinhole cameras on windows, fences, or lamp posts, wait patiently, and then share a single image that shows time like a landscape. From many individual contributions a collective memory of places, seasons, and light emerges.

The five words in the title and what they mean

Silver: In analog photography, silver halides react to light. In the pinhole camera this quiet chemistry lives in the paper as well. It makes invisible duration visible.

Lavender and asphalt: A small bow to the early days of photography. Joseph Nicéphore Niépce experimented with bitumen that hardens in sunlight, dissolved in lavender oil. From this mixture came heliography, one of the oldest photographic techniques. An early proof that patience and sun are enough.

Sun and time: Both are the real lens in the project. The sun traces its path day by day. Time lets structures grow that we overlook in everyday life.

How The 7th Day works in three simple steps

Fix the pinhole camera: A small box without a lens, with a pin sized hole, firmly mounted in one place. Inside lies light sensitive photographic paper.

Expose for a long time: Outside, a few days often suffice, faster in summer, longer in winter, indoors rather weeks. Overexposure is surprisingly rare. Time distributes light like a fine brush.

Make the image visible: The paper is removed and digitized. What appears is a portrait of time, not a single moment but what happens between moments.

Why this approach matters today

Slowing down instead of point and shoot: In a world full of burst shots, the pinhole camera reminds us that waiting can be a creative method. Once you mount the camera, you start to think about direction, season, and rhythm.

Democratic and accessible: You do not need expensive gear. The project shows that curiosity and patience are enough to make art. It is ideal for schools, workshops, clubs, or curious individuals.

A new look at place: Long exposure reveals qualities that escape the quick eye. How does the weather move, where does the light travel, what traces does everyday life leave.

Want to get started yourself?

You only need a light tight can, a pin prick, and photographic paper. Find a spot with an open view to the sky, mount the camera so it resists the weather, mark the start date, and let time do the work. The first result is rarely perfect but almost always surprising. With every attempt your feel for location, angle, and duration grows.

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Click here to get to the project.

Exposure time per image – one year

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The camera was attached to the gate of the silent house in Ameugny (Taize) for 7 days and accompanied the silence of the participants. The movement of the gate was the only external sign of communication with the non-silent world.

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A key reason lies in the photographic paper we use. Each type of paper has its own chemical composition and therefore reacts differently to light. In our project, we use hundreds of different papers – some of them more than 50 years old. (see images below)

Comparing Different Photographic Papers

To illustrate these differences, we carried out a small experiment:
We exposed fifteen different types of photographic paper to light. Half of each sheet was covered with black cardboard (Image 1).

Result: In Image 4 the different color nuances of each paper can clearly be seen.

After two hours of exposure: the uncovered parts had already darkened significantly.

After another two and a half hours: the previously covered areas also darkened until each sheet showed a uniform tone (Image 2–3).

Negative and Positive – An Example

In the following image you see on the left a sheet of photographic paper exposed for one year as a negative:

• Areas with a lot of sunlight appear in deep blue (for example, the traces of the sun).
• Areas with less light exposure remain brighter (such as the house in the picture).

When we invert this negative into a positive, the complementary colors emerge:

• The blue traces of the sun become a strong red.
• The house shifts from purple/yellow to green/blue.

Photographs with a short exposure time (7–14 days) usually appear more monochrome.
With long-term exposures, however, a wide spectrum of colors often develops.

Chance as Part of the Art Project

What the final image will look like is something we can never predict. This element of chance is an essential part of our project: every photograph becomes a unique work of art.

We would like to thank the I.G. Schwarz-Weiß Fotoclub Weil der Stadt e.V. for kindly providing the photographic papers used in this experiment.

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All right, I thought, and ordered two film cans for 10 EUR each. That’s a fair price for the fact that I don’t have to place the negative in a can myself and drill a hole in the right size. I’m too impatient for that. I don’t have to develop and scan the film either – wonderful. The Cameras came immediately, but they seemed so valuable and meaningful to me that I left them lying around for 11 months….

On New Year’s Eve 2012, I found myself on the roof. For a long time I had pondered where and how I would fix the cans – especially in winter with snow. The images should be as different as possible, so I took one direction to the west (1), one direction to the north (2). I was curious to know if you would see the traces of the night fireworks, and I already suspected that the shaky ventilation cap might lead to a double contour for Motive 2. Never mind!

Then the waiting started: In summer, 7 days of exposure time, in winter it is two weeks. After that, you take the cans back in, take the negative out of the can and send it back to Przemek Zajfert. A little later you can download your image from the password-protected gallery. The motifs are also shown in the public gallery and on facebook.

Anyone who has ever wanted to experiment with such a pinhole camera: it couldn’t be easier.

You can’t control the distribution of tyour pictures: every project participant has access to the password-protected gallery and can download the originals. Still, I enjoyed it. I have just ordered three more Cameras. This time it will be quicker to set up and to send it in!

This is a blog post from the participant Jacqueline Esen. Visit her blog here.

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This picture was made in the Black Forest. The pictures below show that it rained on most days of the exposure. However, only the sky and a part of the orbit of the sun was recorded by the camera.

Thanks to S. Gritsa for the pictures.

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