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 Pro1
VS
Sensor area
38 mm²
PowerShot A64058 mm²
PowerShot Pro1- Area ratio
- 1.53:1
- Absolute difference
- 20 mm²
- Relative difference
- 53.3%
The PowerShot Pro1 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
PowerShot A640MetricPowerShot Pro1
10 MPEffective pixels8 MP
7.11 × 5.33Sensor8.8 × 6.6
1.95 µmPixel pitch2.69 µm
3.79 µm²Pixel area7.26 µm²
26.39 MP/cm²Pixel density13.77 MP/cm²
4.87Crop factor3.93
—Maximum video—
327 gWeight640 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 Pro1 has the larger sensor area. The PowerShot A640 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 Pro1
Released in 2004, PowerShot Pro1 has about 58 mm² of sensor area, 8 MP effective resolution, and a 640 g body. Use these values to narrow the field, not as an overall image-quality score.