The Canon EOS-1D Mark IV is 10.5 mm wider, 48.8 mm taller, 6.4 mm deeper and 408 g heavier than the Canon EOS 40D.
| Canon EOS 40D | Canon EOS-1D Mark IV | |
|---|---|---|
| Size (W × H × D) | 145.5 × 107.8 × 73.5 mm | 156 × 156.6 × 79.9 mm |
| Weight | 822 g | 1,230 g |
| Lens | Canon EF | Canon EF |
| Sensor | APS-C | APS-H |
| Announced | 2007 | 2009 |