Reasons to choose E-420
Released in 2008, E-420 has about 225 mm² of sensor area, 10 MP effective resolution, and a 426 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Olympus E-420
vs Sigma SD15
VS
Sensor area
225 mm²
E-420286 mm²
SD15- Area ratio
- 1.27:1
- Absolute difference
- 61 mm²
- Relative difference
- 27%
The SD15 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
E-420MetricSD15
10 MPEffective pixels4.7 MP
17.3 × 13Sensor20.7 × 13.8
4.74 µmPixel pitch7.8 µm
22.49 µm²Pixel area60.78 µm²
4.45 MP/cm²Pixel density1.65 MP/cm²
2Crop factor1.74
—Maximum video—
426 gWeight750 g
Compact Flash (Type I or II), xD Picture CardStorageSDHC, Secure Digital
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 SD15 has the larger sensor area. The E-420 has the lighter body. The E-420 has the higher effective resolution. The SD15 is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose SD15
Released in 2010, SD15 has about 286 mm² of sensor area, 4.7 MP effective resolution, and a 750 g body. Use these values to narrow the field, not as an overall image-quality score.