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Numismatic Photography: How to Best Document Your Collection?

Building a collection of ancient coins is about bringing together pieces of history. However, sharing the story of these pieces, documenting them, and recording them for practical purposes such as insurance,

is at least as important as collecting them. This is where good numismatic photography comes in. A high-quality photograph of a coin can reveal all its details, artistic subtleties, and condition, conveying the coin's character even to someone who cannot physically hold it. While professional equipment can seem daunting, it is possible to achieve striking results even with a smartphone or a simple digital camera, by applying a few basic principles and correct techniques.

1. Essential Equipment: Stability and Magnification The biggest enemies in numismatic photography are camera shake and insufficient magnification. To overcome these issues, a few essential pieces of equipment are required:

  • A Stable Platform: Coin photographs should never be taken handheld. Even the slightest tremor will blur the image. A sturdy tripod or, even better, a copy stand that allows the camera to point directly downwards, is an absolute necessity. Even the chassis of an old photographic enlarger can be converted into an excellent copy stand for this purpose.  

  • Close-up Capability (Macro): For a coin to fill the entire frame, your camera needs to be able to focus very closely. For DSLR or mirrorless cameras, the best solution is to use a macro lens. A focal length of around 100mm offers both sufficient magnification and a comfortable working distance for lighting. For smartphones, a high-quality macro adapter lens that can be attached to the phone can yield good results.  

2. The Art of Lighting: Revealing Details In numismatic photography, the most critical and challenging element is lighting. Remember, you are not photographing the coin itself, but the light reflected from it.  

  • Soft and Diffused Light: Direct and harsh light (such as a flash or bare bulb) causes bright reflections (hot spots) and harsh shadows on metal surfaces, obliterating all details. The goal is to soften and diffuse the light. Equipment called softboxes or diffusers are used for this purpose. As a simple home solution, you can place a translucent white plastic sheet or a piece of cheesecloth between the light source and the coin.  

  • Using Two Light Sources: The best results are usually achieved by using two light sources. Placing the lights on either side of the coin, at the 10 o'clock and 2 o'clock positions, at an angle of approximately 45 degrees, provides balanced illumination that emphasizes the relief on the surface.

  • Experimenting with Light: There is no single correct lighting setup. Different coins require different lighting angles. Experiment by changing the position and angle of the light sources to discover how best to reveal a coin's toning, luster, or fine details.  

3. Setup and Shooting Technique

  • Background: Choose a neutral background that will not detract from the coin itself. Matte black, gray, or white usually yield the best results. A good technique is to place the coin a few centimeters above the background, on a small cork or eraser, to prevent shadows from forming.  

  • Camera Settings:

    • Aperture: To ensure that the entire surface of the coin (both its highest and lowest points) is in focus, use a high f-stop value (small aperture opening). Values such as f/8 or f/11 are a good starting point.  

    • ISO: To minimize noise in the image, use the lowest possible ISO setting (usually ISO 100).  

    • Timer or Remote Control: To prevent even the slightest shake that can occur when pressing the shutter button, use the camera's 2 or 10-second timer or a remote control.

  • Focusing: Instead of autofocus, use manual focusing to ensure that the most important details of the coin (e.g., the eye of a portrait or a letter of the legend) are perfectly sharp.

4. Advanced Technique: Focus Stacking On coins with high relief, even a small aperture opening may not ensure that the entire coin is in focus simultaneously. In such cases, a technique called "focus stacking" is used. In this technique, multiple photographs are taken, each focused on a different depth of the coin, and these photos are then combined using specialized software like Helicon Focus to create a single image that is perfectly sharp from front to back.  

Numismatic photography is a skill that requires patience and experimentation. Don't hesitate to experiment with different lighting angles, backgrounds, and camera settings. By applying these fundamental principles, you can capture photographs that reflect the beauty and historical significance of your collection, photos you'll be proud to keep for your personal archive and to share with others.

Source:
https://www.forumancientcoins.com/dougsmith/photo.html
https://www.legacy-coins.com/numismatic-photography-a-step-by-step-guide-to-capturing-stunning-coin-images
https://www.forumancientcoins.com/dougsmith/photo.html#:~:text=Lower%20speed%20films%20(ISO%20100,is%20exposed%20at%20ISO%2064.
https://chsopensource.org/photography-of-ancient-coins-rti/#:~:text=RTI%20documentation%20of%20ancient%20coins%20with%20a%20105%20mm%20macro%20lens.&text=The%2027%20images%20were%20taken,the%20border%20of%20the%20frame.