Reasons to choose EOS R6 Mark III
Released in 2025, EOS R6 Mark III has about 858.01 mm² of sensor area, 32.5 MP effective resolution, and a 699 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Canon EOS R6 Mark III
vs Ricoh GR IV
VS
Sensor area
858.01 mm²
EOS R6 Mark III361.15 mm²
GR IV- Area ratio
- 2.38:1
- Absolute difference
- 496.86 mm²
- Relative difference
- 138%
The EOS R6 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.
Key specification differences
EOS R6 Mark IIIMetricGR IV
32.5 MP
Effective pixels
25.7 MP
35.9 × 23.9
Sensor
23.3 × 15.5
5.14 µm
Pixel pitch
3.75 µm
26.40 µm²
Pixel area
14.05 µm²
3.79 MP/cm²
Pixel density
7.12 MP/cm²
1.00
Crop factor
1.55
6960 × 4640 / 30p
Maximum video
1920 × 1080 / 60p
699 g
Weight
262 g
SD UHS-II / CFexpress Type B
Storage
SD UHS-I / internal storage
LP-E6P Li-ion battery
Battery
DB-120 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 R6 Mark III has the larger sensor area. The GR IV has the lighter body. The EOS R6 Mark III has the higher effective resolution. The EOS R6 Mark III and GR IV were both released in 2025. Also consider the lens system and subjects you shoot.
Reasons to choose GR IV
Released in 2025, GR IV has about 361.15 mm² of sensor area, 25.7 MP effective resolution, and a 262 g body. Use these values to narrow the field, not as an overall image-quality score.