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 a1
VS
Sensor area
864 mm²
EOS R3862 mm²
a1- Area ratio
- 1:1
- Absolute difference
- 2 mm²
- Relative difference
- 0.3%
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 R3Metrica1
24.1 MPEffective pixels50.1 MP
36 × 24Sensor35.9 × 24
5.99 µmPixel pitch4.15 µm
35.85 µm²Pixel area17.2 µm²
2.79 MP/cm²Pixel density5.81 MP/cm²
1Crop factor1
6,000 × 3,164Maximum video7,680 × 4,320
1,015 gWeight737 g
SD/SDHC/SDXC/UHS-II/CFexpress Type BStorageSD/SDHC/SDXC, CFexpress
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 a1 has the lighter body. The a1 has the higher effective resolution. The EOS R3 and a1 were both released in 2021. Also consider the lens system and subjects you shoot.
Reasons to choose a1
Released in 2021, a1 has about 862 mm² of sensor area, 50.1 MP effective resolution, and a 737 g body. Use these values to narrow the field, not as an overall image-quality score.