Reasons to choose R-D1
Released in 2004, R-D1 has about 370 mm² of sensor area, 6 MP effective resolution, and a 620 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Epson R-D1
vs Sigma SD9
VS
Sensor area
370 mm²
R-D1286 mm²
SD9- Area ratio
- 1.29:1
- Absolute difference
- 84 mm²
- Relative difference
- 29.4%
The R-D1 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 2 years apart. Consider sensor generation when comparing pixel metrics.
Key specification differences
R-D1MetricSD9
6 MPEffective pixels3.4 MP
23.7 × 15.6Sensor20.7 × 13.8
7.85 µmPixel pitch9.17 µm
61.62 µm²Pixel area84.02 µm²
1.62 MP/cm²Pixel density1.19 MP/cm²
1.53Crop factor1.74
—Maximum video—
620 gWeight803 g
Secure DigitalStorageCompactFlash type I, CompactFlash type II, Microdrive
Lithium-Ion rechargeable Li-ion batteryBatteryLithium-Ion rechargeable 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 R-D1 has the larger sensor area. The R-D1 has the lighter body. The R-D1 has the higher effective resolution. The R-D1 is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose SD9
Released in 2002, SD9 has about 286 mm² of sensor area, 3.4 MP effective resolution, and a 803 g body. Use these values to narrow the field, not as an overall image-quality score.