Reasons to choose EOS R3
Released in 2021, EOS R3 has about 864 mm² of sensor area, 24.1 MP effective resolution, and a 1,015 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Canon EOS R3
vs Sony A7 IV
VS
Sensor area
864 mm²
EOS R3858 mm²
A7 IV- Area ratio
- 1.01:1
- Absolute difference
- 6 mm²
- Relative difference
- 0.7%
The EOS R3 has the larger sensor area. More area usually means greater light-gathering potential, though real image quality still depends on sensor architecture and generation.
Key specification differences
EOS R3MetricA7 IV
24.1 MPEffective pixels33 MP
36 × 24Sensor35.9 × 23.9
5.99 µmPixel pitch5.1 µm
35.85 µm²Pixel area26 µm²
2.79 MP/cm²Pixel density3.85 MP/cm²
1Crop factor1
6,000 × 3,164Maximum video3,840 × 2,160
1,015 gWeight658 g
SD/SDHC/SDXC/UHS-II/CFexpress Type BStorageSD/SDHC/SDXC, CFexpress A
Rechargeable Li-ion Battery LP-E19 Li-ion batteryBatteryNP-FZ100 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 R3 has the larger sensor area. The A7 IV has the lighter body. The A7 IV has the higher effective resolution. The EOS R3 and A7 IV were both released in 2021. Also consider the lens system and subjects you shoot.
Reasons to choose A7 IV
Released in 2021, A7 IV has about 858 mm² of sensor area, 33 MP effective resolution, and a 658 g body. Use these values to narrow the field, not as an overall image-quality score.