Reasons to choose EOS-1D X Mark III
Released in 2020, EOS-1D X Mark III has about 864 mm² of sensor area, 20.1 MP effective resolution, and a 1,440 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Canon EOS-1D X Mark III
vs Canon EOS RP
VS
Sensor area
864 mm²
EOS-1D X Mark III862 mm²
EOS RP- Area ratio
- 1:1
- Absolute difference
- 2 mm²
- Relative difference
- 0.3%
The EOS-1D X Mark III has the larger sensor area. More area usually means greater light-gathering potential, though real image quality still depends on sensor architecture and generation.
These cameras were released 1 years apart. Consider sensor generation when comparing pixel metrics.
Key specification differences
EOS-1D X Mark IIIMetricEOS RP
20.1 MPEffective pixels26.2 MP
36 × 24Sensor35.9 × 24
6.56 µmPixel pitch5.73 µm
42.99 µm²Pixel area32.89 µm²
2.33 MP/cm²Pixel density3.04 MP/cm²
1Crop factor1
5,472 × 2,286Maximum video3,840 × 2,160
1,440 gWeight485 g
CFexpress type BStorageSD/SDHC/SDXC
LP-E19 lithium-ion battery Li-ion batteryBatteryLP-E17 lithium-ion battery Li-ion battery
Amber marks the value that is generally preferable in this comparison context. It is not an overall camera score.
How to choose between these cameras
The EOS-1D X Mark III has the larger sensor area. The EOS RP has the lighter body. The EOS RP has the higher effective resolution. The EOS-1D X Mark III is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose EOS RP
Released in 2019, EOS RP has about 862 mm² of sensor area, 26.2 MP effective resolution, and a 485 g body. Use these values to narrow the field, not as an overall image-quality score.