The Pentax K-1 is 21.5 mm narrower, 57.6 mm shorter, 2.9 mm deeper and 240 g lighter than the Canon EOS-1D X Mark III.
| Canon EOS-1D X Mark III | Pentax K-1 | |
|---|---|---|
| Size (W × H × D) | 158 × 167.6 × 82.6 mm | 136.5 × 110 × 85.5 mm |
| Weight | 1,250 g | 1,010 g |
| Lens | Canon EF | Pentax K |
| Sensor | Full frame | — |
| Announced | 2020 | 2016 |