5. mar 2025

Does it fit?

Learn about importance of standardization and how to make sure that your old 9x12 cm camera can fit our Katrašnik 9x12 Cassetes 

Photography has always been a craft of precision, requiring seamless integration between cameras, lenses, and accessories. However, in the early days of photography, one major issue plagued photographers: the lack of standardization in camera cassettes. Each manufacturer designed its own cassettes with different dimensions, folds, and locking mechanisms, making it nearly impossible to interchange them between cameras. This led to frustration, compatibility issues, and additional costs for photographers who had to buy specific cassettes for each camera model.

The Problem of Non-Standardized Cassettes

During the late 19th and early 20th centuries, the field of plate photography was growing rapidly, with companies such as Voigtländer, AGFA, ICA, Contessa, and Hüttig producing cameras and accessories. However, instead of adopting a universal design for film or plate holders, each company developed its own proprietary system. 

This led to several challenges: 

  • Interchangeability issues – A cassette made for one brand was often incompatible with another, even if the format size was the same.
  • Extra costs for photographers – Professionals and enthusiasts had to buy multiple sets of cassettes to accommodate different cameras.
  • Difficulty in sourcing replacements – If a photographer lost or damaged a cassette, finding a replacement was difficult unless it was from the same manufacturer.
  • Lack of long-term usability – As manufacturers updated their designs, older cassettes became obsolete, making it harder to maintain vintage equipment.

Recognizing these problems, efforts were made to create a standardized solution that would ensure compatibility across different camera brands.



The Introduction of the Normal Fold Cassette (Normalfalzkassette)

To solve the issue of incompatibility, the Normenausschuss der Deutschen Industrie (Standardization Committee of German Industry) introduced the Normalfalzkassette (Standard Fold Cassette). This standard defined the dimensions of the fold (Falz) of metal cassettes, ensuring a consistent design that multiple manufacturers could adopt.

By the mid-20th century, the Normalfalzkassette became the most widely used standard for plate camera cassettes. Today, an estimated 80–90% of cameras that use metal cassettes are compatible with the Normalfalzkassette standard, significantly reducing compatibility issues.



European vs. American Camera Systems: Why EU Cassettes Are Always Metal

One key difference between European and American cameras is how they were designed for compactness.

  • European cameras were engineered to be as small and efficient as possible. This led to the development of metal cassettes, as they needed to be thin and durable to fit within the compact designs.
  • American cameras, particularly the large-format 4×5-inch cameras, originally used wooden holders. These holders had more internal space and structural support, making it possible to manufacture them from modern plastics today.

For comparison:

📏 A European 9×12 cm camera with six holders is still smaller than a single American 4×5-inch camera alone!

Because of this design philosophy, European-style cassettes must still be made from metal to maintain the necessary strength and thin profile. Unlike American-style plastic holders, there is no alternative material that can provide the same level of precision, durability, and compactness for European cameras.



How Our Cassettes Solve the Compatibility Problem

Understanding the importance of universal compatibility, we manufacture our cassettes strictly following the Normalfalzkassette standard. This ensures:

Seamless fit with standard plate cameras – No need to modify or adapt the cassettes.
Interchangeability between different brands – Works with cameras from multiple manufacturers that used standards.
Reliable, precise dimensions – No risk of loose or tight-fitting cassettes.
Long-term usability – Ensures continued use even if camera brands evolve.



Testing Your Camera for Compatibility

If you're unsure whether your camera is compatible with the Normalfalzkassette, you can test it in three ways:

1. Measure Your Camera’s Cassette Holder

To check compatibility manually, take these measurements from your camera:

  • Width and depth of the cassette holder
  • Fold (Falz) dimensions
  • Distance from the film plane

Compare these measurements with Normalfalzkassette specifications to determine compatibility.

2. Measure Your Camera Back

If you don’t have an existing cassette to measure, you can check the camera back instead:

  • Measure the opening where the cassette slides in – This should match Normalfalzkassette dimensions.
  • Check the depth of the slot – The fold (Falz) should fit snugly into the camera back without excessive gaps.
  • Ensure proper alignment with the focusing screen – A correctly fitting cassette should position the plate at the exact focal plane.

3. Use a 3D-Printed Test Cassette

For an easier solution, we offer a free 3D-printable testing cassette that you can download and print yourself. This allows you to check the fit before purchasing a metal cassette, ensuring a perfect match for your camera.



Why Standardization Matters for the Future of Photography

Even in today’s world of digital photography, standardization remains crucial. Just as modern cameras use standardized memory cards, batteries, and lens mounts, ensuring compatibility in plate cameras and their accessories is equally important. The Normalfalzkassette standard has made it easier for photographers to continue using classic and large-format cameras without the frustrations of mismatched accessories.

By choosing standardized cassettes, you are ensuring a hassle-free experience, allowing you to focus on creativity rather than technical difficulties. If you have any questions about compatibility, feel free to reach out—we’re here to help!

Visit download page for
3D printable test cassette