| Manufacturer | Canon |
| Name | PowerShot A400 |
| Image sensor | 1/3.2in 3.2 Megapixel CCD |
| Max Output Resolution | 2048 x 1536 |
| Other Resolutions | 1600 x 1200, 1024 x 768, 640 x 480 |
| Zoom | 2.2X (optical), 3.2X (digital) |
| Optical focal length (35mm equiv) | 5.9 - 13.2 (45-100mm) |
| Maximum lens aperture | f3.8 |
| Shutter speeds | 1 sec - 1/1500 second |
| ISO rating | Auto/50/100/200/400 |
| LCD screen | 1.5in TFT, 115,000 pixels (with brightness adjustment) |
| Optical Viewfinder | Real-image optical viewfinder |
| Flash | Range: 0.47 to 2.0m, Settings: Auto, Red Eye Reduction, Forced on/off |
| Exposure Control | Auto, Manual, Stitch Assist, Movie, Special scene mode (Portrait, Night Scene, Foliage, Snow, Beach, Fireworks, Underwater, Indoor). |
| Exposure Metering | Evaluative, Centre-weighted or Spot |
| Exposure Compensation | Yes, manually -2EV, +2EV (0.3EV steps) |
| White balance modes | Auto, Daylight, Cloudy, Tungsten, Fluorescent, Fluorescent H, Custom |
| Auto-Focus | TTL contrast detection, 9 focus points |
| Manual focus | No. Forced Infinity Setting Only |
| Macro focus distance | 5cm |
| Recording Modes | Single, Continuous (Approx. 1.3 fps speed maintained for up to 12 images) |
| Image formats | JPEG (Exif 2.2 [Exif Print] compliant) / Design rule for Camera File system, Digital Print Order Format [DPOF] Version 1.1 compliant |
| Compression | Superfine, Fine, Normal |
| Picture Adjustments | Vivid, Neutral, Low Sharpening, Sepia, Black & White |
| Video recording (max res / format) | 640 x 480 (10FPS) 320 x 240 / 160 x 120 AVI (15fps) AVI [Motion JPEG + WAVE (monaural)] |
| ...with sound | Yes, with built-in microphone and speaker. |
| Movie Length | Up to 30 sec (640 x 480), Up to 3 mins (320 x 240, 160 x 120) - Depending on memory card speed / capacity |
| Self-timer | Yes, 10 or 2 seconds |
| Memory card slot | Secure Digital (SD) |
| Supplied Memory | 16MB SD card |
| Batteries supplied | Alkaline (2xAA) |
| Recharger supplied | No |
| A/V output | Yes, PAL and NTSC |
| Ports | USB (Mini-B, PTP), A/V, DC power input |
| Accessories | AV/USB cables, wrist strap |
| Dimensions (W x H x D) | 107 x 53.4 x 36.8mm |
| Weight (Body Only) | 165g |
| Software | ArcSoft PhotoImpression, ArcSoft VideoImpression, TWAIN (Windows 98 / 2000), WIA (Windows Me), PhotoStitch, ZoomBrowser EX (PhotoRecord) / ImageBrowser |
| Warranty | 12 Months |