Reasons to choose PowerShot A640
Released in 2006, PowerShot A640 has about 38 mm² of sensor area, 10 MP effective resolution, and a 327 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Canon PowerShot A640
vs Canon PowerShot S70
VS
Sensor area
38 mm²
PowerShot A64038 mm²
PowerShot S70- Area ratio
- 1:1
- Absolute difference
- 0 mm²
- Relative difference
- 0%
The PowerShot A640 and PowerShot S70 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 A640MetricPowerShot S70
10 MPEffective pixels7.1 MP
7.11 × 5.33Sensor7.11 × 5.33
1.95 µmPixel pitch2.31 µm
3.79 µm²Pixel area5.34 µm²
26.39 MP/cm²Pixel density18.74 MP/cm²
4.87Crop factor4.87
—Maximum video—
327 gWeight300 g
MultiMedia, Secure DigitalStorageCompact Flash (Type I or II)
AA (4) batteries (NiMH recommended)BatteryCanon Lithium-Ion 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 A640 and PowerShot S70 have the same sensor area. The PowerShot S70 has the lighter body. The PowerShot A640 has the higher effective resolution. The PowerShot A640 is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose PowerShot S70
Released in 2004, PowerShot S70 has about 38 mm² of sensor area, 7.1 MP effective resolution, and a 300 g body. Use these values to narrow the field, not as an overall image-quality score.