Negative size is the dimensions of an image taken by a camera. It is different from film format as one film format can be used for various different negative sizes.
| Name | 35mm half frame |
| Size | 18.0 × 24.0mm |
| Diagonal | 30.0mm |
| Crop factor | 1.44× |
| Area | 432mm² |
| Aspect ratio | 0.75 |
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