45mm Medium format vs 35mm Full frame
45mm Medium format and 35mm Full frame frame practically the same. The shapes differ: 45mm Medium format is 4:3, 35mm Full frame is 3:2.

A 45mm Medium format
B 35mm Full frame


The numbers
| A 45mm on Medium format | B 35mm on Full frame | |
|---|---|---|
| Focal length | 45mm | 35mm |
| Full-frame equivalent | 35.6mm | 35mm |
| Horizontal | 51.9° | 54.4° |
| Vertical | 40.2° | 37.8° |
| Diagonal | 62.7° | 63.4° |
| Sensor | Medium format 43.8 × 32.9 mm | Full frame 36 × 24 mm |
| Crop factor | ×0.8 | ×1 |
| Aspect ratio | 4:3 | 3:2 |
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