24×18 mm
Dimensions
1.44×
Crop factor
432 mm²
Area (50% of FF)
-1.0
Stops of light vs full frame
4:3
Aspect ratio
20.8 µm
Circle of confusion
About Half-frame 35 mm film#
Half of a 35 mm frame — twice as many shots per roll.
Typical cameras: Olympus PEN F, Kodak Ektar H35.
Compared to other formats#
Lens needed for the same framing#
| Full-frame focal length | Equivalent on Half-frame 35 mm film | Horizontal angle |
|---|---|---|
| 14 mm | 9.7 mm | 102.1° |
| 24 mm | 16.6 mm | 71.6° |
| 35 mm | 24.3 mm | 52.6° |
| 50 mm | 34.7 mm | 38.2° |
| 85 mm | 58.9 mm | 23.0° |
| 135 mm | 93.6 mm | 14.6° |
| 200 mm | 138.7 mm | 9.9° |
Equivalent aperture for depth of field#
| On Half-frame 35 mm film | Full-frame equivalent |
|---|---|
| f/1.4 | f/2.0 |
| f/2 | f/2.9 |
| f/2.8 | f/4.0 |
| f/4 | f/5.8 |
| f/5.6 | f/8.1 |
| f/8 | f/11.5 |
Cameras with a Half-frame 35 mm film frame#
2 cameras in our database.
Frequently asked questions#
What is the crop factor of Half-frame 35 mm film?
1.44× (diagonal 30.0 mm vs 43.3 mm for full frame).
How big is a Half-frame 35 mm film sensor?
24 × 18 mm, an area of 432 mm².
Is Half-frame 35 mm film good in low light?
At the same exposure it gathers 1.0 stops less total light than full frame, so expect roughly that much more visible noise at equal print size. Modern processing narrows but doesn't erase the gap.
Last updated October 03, 2026 · How we calculate · Sources