| PowerShot A640 |
| Camera effective pixels | Approx. 10.0 million |
| Image Sensor | 1/1.8-inch CCD (Total number of pixels: Approx. 10.4 million) |
| Lens | 7.3 (W) - 29.2 (T) mm (35mm film equivalent: 35 (W) - 140 (T) mm) f/2.8 (W) - f/4.1 (T) |
| Digital Zoom | Approx. 4.0x (Up to approx. 16x in combination with the optical zoom) |
| Optical Viewfinder | Real-image zoom viewfinder |
| LCD Monitor | 2.5-inch, low-temperature polycrystalline silicon TFT color LCD, approx. 115,000 pixels |
| AF System | TTL autofocus |
| Shooting Distance (From the front of the lens) | Normal: 45 cm (18 in.) - infinity Macro: 1 - 45 cm (W)/25 - 45 cm (T) (0.4 - 18 in. (W)/9.8 - 18 in. (T)) Manual focus: 1 cm (0.4 in.) - infinity (W)/25 cm (9.8 in.) - infinity (T) |
| Shutter | Mechanical + electronic |
| Shutter Speeds | 15 - 1/2500 sec.
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| Light Metering Method | Evaluative metering / Center-weighted average metering / Spot metering |
| Exposure Control | Program AE, Shutter-priority AE, Aperture-priority AE or Manual exposure |
| Exposure Compensation | +/- 2 stops in 1/3-stop increments, Safety Shift is available |
| Sensitivity | AUTO* High ISO AUTO*/ISO 80/100/200/400/800 equivalent *Camera automatically sets the optimal speed. |
| White Balance | TTL auto, pre-set (available settings: Daylight, Cloudy, Tungsten, Fluorescent, Fluorescent H or Underwater) or custom |