Canon PowerShot A20 Specifications

Street Price
US$ 500
Max resolution
1600 x 1200
Low resolution
1024 x 768, 640 x 480
Image ratio w:h
CCD pixelsClick for help
2.1 megapixels (1.92 effective)
CCD sizeClick for help**
ISO ratingClick for help
Auto (100 - 150)
Lens Aperture
F2.7 - F4.8
Lens Thread 52 mm with LA-DC52 adapter
Zoom wide (W)Click for help
35 mm
Zoom tele (T)Click for help
105 mm (3 x)
Digital zoomClick for help
Yes, smooth up to 2.5 x
Auto Focus
Contrast detection, AiAF 3-point system
AF Illumination lamp
Yes, visible light (orange), can not be disabled
Manual FocusClick for help
No, only infinity lock
Normal focus range
76 cm (30") - Infinity
Macro focus range
16 cm (6.3") - 76 cm (30")
White Balance
Auto, Daylight, Cloudy, Tungsten, Fluoresecent
Min shutterClick for help
1 sec
Max shutterClick for help
Built-in Flash
Yes, internal
Flash Range

Wide: 0.76 m - 4.2 m (2.5 - 13.8 ft)
Tele: 0.76 m - 2.5 m (2.5 - 8.2 ft)

Flash modes
Auto, Anti Red-Eye Auto, Flash On, Flash Off, Slow Sync
Exposure adjustmentClick for help
-2EV to +2EV in 1/3EV steps
MeteringClick for help
Center-weighted ("Evaluative")
Aperture priorityClick for help
Shutter priorityClick for help
Full manualClick for help
Yes, approx 2.5 fps for 6 images
Movie mode
Tripod mount
Yes, plastic
Yes, 10s delay
Remote control
Yes, PC controlled via USB cable (software supplied)
Time-lapse recording
Yes, PC controlled via USB cable (software supplied)
Video out
Yes, selectable NTSC / PAL
Storage media
Compact Flash Type I
Storage included
8 MB Compact Flash card
Uncompressed format
Compressed format
Quality Levels
Super-Fine, Fine, Standard
1.5" TFT
Playback zoom
Yes, 2.0x
Operating system
BatteryClick for help
4 x AA Alkaline supplied, NiMH rechargeable recommended
Battery chargerClick for help
Weight (inc. battery)
375 g (13.2 oz)
110 x 71 x 38 mm (4.3 x 2.8 x 1.5 in)

Click for help- click for pop-up help


This measuring system is a leftover from the days of video TUBES and has nothing to do with the surface area of the chip in a direct sense. The Edmund Scientific Optics catalog has a sidebar that completely backs up the idea.

For instance, a "one inch" chip has a 16mm diagonal sensor array. A "one half inch" chip has an array of only 8mm in the diagonal. This means that the 1/1.8 = 0.555 inch measurement means NOTHING about the sensor array size. Unless they have changed the entire measurement system just for this chip, the actual sensor patch is 11% larger than the 8mm of a 1/2 chip or 8.88mm in diagonal.

(Mark Schubin of Videography Magazine)