The Canon EOS-1D X is 20 mm wider, 86.6 mm taller, 49.2 mm deeper and 630 g heavier than the Leica M3.
| Leica M3 | Canon EOS-1D X | |
|---|---|---|
| Size (W × H × D) | 138 × 77 × 33.5 mm | 158 × 163.6 × 82.7 mm |
| Weight | 580 g | 1,210 g |
| Lens | Leica M | Canon EF |
| Sensor | — | Full frame |
| Announced | 1954 | 2011 |