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 | 2½" × 4¼" |
| Size | 108.0 × 63.5mm |
| Diagonal | 125.3mm |
| Crop factor | 0.35× |
| Area | 6858mm² |
| Aspect ratio | 1.70 |
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