Reasons to choose PowerShot A490
Released in 2010, PowerShot A490 has about 28 mm² of sensor area, 10 MP effective resolution, and a 135 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Canon PowerShot A490
vs Canon PowerShot D20
VS
Sensor area
28 mm²
PowerShot A49028 mm²
PowerShot D20- Area ratio
- 1:1
- Absolute difference
- 0 mm²
- Relative difference
- 0%
The PowerShot A490 and PowerShot D20 have the same sensor area. Compare pixel density, sensor architecture, and release generation to understand likely image-quality differences.
These cameras were released 2 years apart. Consider sensor generation when comparing pixel metrics.
Key specification differences
PowerShot A490MetricPowerShot D20
10 MPEffective pixels12.1 MP
6.16 × 4.62Sensor6.16 × 4.62
1.69 µmPixel pitch1.53 µm
2.85 µm²Pixel area2.35 µm²
35.14 MP/cm²Pixel density42.52 MP/cm²
5.62Crop factor5.62
—Maximum video—
135 gWeight228 g
SDHC, Secure DigitalStorageSD/SDHC/SDXC
2 x AA batteries (Alkaline or NiMH)BatteryLithium-Ion NB-6L 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 PowerShot A490 and PowerShot D20 have the same sensor area. The PowerShot A490 has the lighter body. The PowerShot D20 has the higher effective resolution. The PowerShot D20 is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose PowerShot D20
Released in 2012, PowerShot D20 has about 28 mm² of sensor area, 12.1 MP effective resolution, and a 228 g body. Use these values to narrow the field, not as an overall image-quality score.