The Canon EOS-1D Mark IV is 18 mm wider, 79.6 mm taller, 46.4 mm deeper and 650 g heavier than the Leica M2.
| Leica M2 | Canon EOS-1D Mark IV | |
|---|---|---|
| Size (W × H × D) | 138 × 77 × 33.5 mm | 156 × 156.6 × 79.9 mm |
| Weight | 580 g | 1,230 g |
| Lens | Leica M | Canon EF |
| Sensor | — | APS-H |
| Announced | 1957 | 2009 |