120 film is wrapped with backing paper rather than contained in a 35mm cassette.
Different cameras expose 6×4.5, 6×6, 6×7, 6×9 and other frame sizes on the same roll.
What to know
- Larger negative area
- Variable frame count
- Backing-paper loading
- No sprocket holes
- Camera-specific frame masks
Development and scanning
The film stock still determines C-41, B&W, E-6 or other processing. Scanning must match the actual frame size.
How 120 film works
120 is a roll-film format approximately 61mm wide. The photosensitive film is attached to backing paper and wound around a spool. Unlike 35mm, it has no metal cassette and no sprocket holes. The camera transports the film by winding the backing paper from the supply spool onto an empty take-up spool.
The name “120” is a Kodak format number, not the width in millimetres. It also should not be confused with 220 film, a related discontinued format that used less backing paper and held roughly twice as many exposures.
Frame sizes and exposure counts
| Camera format | Approximate frame | Typical exposures |
|---|---|---|
| 6×4.5 | 56 × 42mm | 15 or 16 |
| 6×6 | 56 × 56mm | 12 |
| 6×7 | 56 × 67mm | 10 |
| 6×8 | About 56 × 76mm | 9 |
| 6×9 | About 56 × 84mm | 8 |
The exact count depends on the camera. Panoramic and specialised cameras may produce fewer, wider frames. This is why the lab needs to scan the actual negatives rather than assume every 120 roll has the same frame shape.
Why the larger negative matters
A 120 negative has substantially more image area than 35mm. With comparable film, exposure and focus, that can produce smoother tonal transitions, finer apparent grain and more detail in larger prints. The trade-off is fewer frames per roll, larger equipment and a slower loading process.
Loading and handling mistakes we commonly see
- Loading the roll backwards, so the backing paper faces the lens.
- Failing to move the empty spool into the take-up position.
- Missing the camera’s start mark and losing the first frame.
- Winding the finished roll too loosely, which can create edge fogging.
- Breaking or losing the adhesive seal before the roll is secured.
Load and unload in subdued light. After the final frame, wind until all film and backing paper are on the take-up spool, then seal the roll firmly. Never unroll an exposed roll to check whether images are present.
Development and scanning choices
120 describes the physical format, not the chemistry. Check the wrapper for C-41, black-and-white, E-6 or another process. For scanning, the frame size and intended use determine the useful resolution. A square 6×6 negative, for example, needs a different crop from a 6×7 portrait frame. Compare the practical differences in 35mm vs 120 film.
Frequently asked questions
Can Berlin Photo Studio handle it?
Yes. We process and scan 120 film in supported processes.
Should I identify the format or process before ordering?
Yes whenever possible. Photograph labels and packaging, and never open unknown exposed film in daylight.
Where can I learn more?
Read 35mm vs 120 film after it is published in this cluster.
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