For portraits, 120 film gives a larger negative, finer detail and a shallower look, while 35mm gives lighter cameras, more frames per roll and easier handling. Choose 120 if you want a deliberate pace and a classic medium format look. Choose 35mm if you want speed, mobility and a lower cost of entry in cameras and lenses.
Negative Size and Look
A 35mm frame measures 24 by 36 millimeters. A 120 roll yields frames that are larger, commonly 6 by 4.5, 6 by 6, 6 by 7 or 6 by 9 centimeters, depending on the camera. A larger negative records finer detail and smoother tones when enlarged.
- Medium format tends to show a shallower depth of field at the same framing and similar aperture.
- Skin tones often look smooth because grain is spread over a larger area.
- 35mm has a more visible grain structure, which many people like for a documentary feel.
Frames per Roll and Pace
A 35mm roll commonly offers 24 or 36 exposures. A 120 roll gives far fewer: roughly 16 on 6 by 4.5, 12 on 6 by 6, 10 on 6 by 7 and 8 on 6 by 9. Fewer frames slow you down, which can help portrait sessions because you plan each shot.
- Talk with your subject while you set up the first frame.
- Meter the light carefully and note settings as a general guide.
- Make a few frames per pose rather than dozens.
- Load a second roll or a spare back for longer sessions.
Cameras and Handling
35mm cameras are smaller, lighter and offer many lens options. Medium format cameras are larger, and some use waist-level viewfinders that change how you interact with the subject. Autofocus is common in 35mm, while many medium format bodies are manual.
Lenses, Light and Cost
Medium format lenses are often slower in maximum aperture than 35mm lenses, so the shallow look comes from the format as much as from the lens. Both formats work well with window light, reflectors and simple flash. Running costs differ too: each 120 frame costs more to buy and develop than a 35mm frame, so many photographers shoot a few careful frames on 120 and use 35mm for casual sessions. Think about how many portraits you make in a typical month before you commit.
Format Comparison
| Trait | 35mm | 120 |
|---|---|---|
| Negative size | Smaller | Larger |
| Frames per roll | Many | Few |
| Camera size | Compact | Bulkier |
| Detail and smoothness | Good | Finer |
| Cost per frame | Lower | Higher |
FAQ
Is medium format always better for portraits?
No. It has a distinct look, but many portraits are made on 35mm. The best format is the one that fits your workflow.
Can I scan both formats at home?
Yes, with a suitable film scanner or a camera copy setup. Check that your scanner supports the frame size you shoot.
The Short Version
Choose 120 for the larger negative and a considered pace. Choose 35mm for freedom, lighter gear and lower running costs. Many portrait photographers keep both and use each for what it does well.
