63mm Medium format vs 50mm Full frame
63mm Medium format and 50mm Full frame frame practically the same. The shapes differ: 63mm Medium format is 4:3, 50mm Full frame is 3:2.

A 63mm Medium format
B 50mm Full frame


The numbers
| A 63mm on Medium format | B 50mm on Full frame | |
|---|---|---|
| Focal length | 63mm | 50mm |
| Full-frame equivalent | 49.8mm | 50mm |
| Horizontal | 38.3° | 39.6° |
| Vertical | 29.3° | 27° |
| Diagonal | 47° | 46.8° |
| 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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