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Technologies Explained:
DIGIC 4
Canon’s DIGIC 4 (Digital Imaging Core) image processor manages all of the camera’s primary functions to optimize operating efficiency. Advanced image processing algorithms deliver superb image detail and colour reproduction with accurate white balance. High-speed processing results in outstanding responsiveness, rapid auto focus and extended continuous shooting ability.
DIGIC 4 also powers advanced Noise Reduction Technology, i-Contrast and Face Detection AF/AE/FE/WB.
Face Detection AF/AE/FE/WB, Face Select & Track and FaceSelf-Timer
Canon’s Face Detection AF/AE/FE/WB system automatically detects up to 35 faces within a frame before adjusting focus, exposure, flash and white balance to ensure optimal results. It is able to determine which faces are intended to be the subject, instantly reverting to the partnering 9-point AiAF system if no face is the primary subject. Face Select & Track allows the user to select a particular face to be the main subject of a photograph and track it, for the best possible results. FaceSelf-Timer allows easy group shots by automatically triggering the shutter shortly after a new face has entered the frame.
i-Contrast
Available in either shooting or playback mode, Canon’s i-Contrast function analyses the exposure, dynamic range and other image characteristics of a shot, then adaptively increases the gain in dark areas – to produce heightened detail in darker regions, without blowing out correctly-exposed parts of the image. The noise reduction function of DIGIC 4 ensures minimal noise in adjusted areas.
iSAPS
iSAPS (intelligent Scene Analysis based on Photographic Space) automatically optimises key camera settings before every shot. Each scene is analysed and cross-referenced against Photographic Space – a vast in-camera library of photographic data. This enables the camera to make optimal adjustments to auto exposure, auto focus and auto white balance before image capture occurs.
Optical Image Stabilizer
The Digital IXUS 980 IS and Digital IXUS 870 IS use a lens shift-type Image Stabilizer (IS) system to detect and correct slight camera shakes that can cause image blur. Minute vibration gyros detect lens tilting caused by hand shake. These signals – 8,000 per second on the Digital IXUS 980 IS, and 4,000 per second on the Digital IXUS 870 IS – are processed by a single-chip IS controller, which discriminates between hand shake and unintentional camera movements.
Shake signals are sent to the IS unit, which moves one of the lens elements accordingly to deflect the light rays and cancel out the effects of shake. For improved accuracy and responsiveness, the moving lens element is supported on tiny ceramic spheres. In addition to minimising friction, ceramic spheres avoid some of the problems that can affect metal systems, such as thermal expansion and magnetism. The optical IS allows photographers to shoot at shutter speeds up to 4 stops slower (Digital IXUS 980 IS) and 3 stops slower (Digital IXUS 870 IS) with no perceptible increase in image blur due to camera shake.
Canon Digital IXUS 980 IS and
Digital IXUS 870 IS specifications
| Digital IXUS 980 IS | Digitasl IXUS 870 IS | |
| Sensor | 1/1.7" Type CCD |
1/2.3 " Type CCD 10 million effective pixels |
| Image sizes | 4416x 3312 pixels 3648 x 2736 pixels 3072 x 2304 pixels 2560 x 1920 pixels 2048 x 1536 pixels 1600 x 1200 pixels 640 x 480 pixels 4416x 2480 pixels |
3648 x 2736 2816 x 2112 2272 x 1704 1600 x 1200 640 x 480 3648 x 2048 |
| Movie clips | 640 x 480 @ 30fps 320 x 240 @ 30fps 160 x 120 @ 15fps |
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| Maximum clip length | Upto 4GB or 1 hour |
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| File formats | JPEG (Exif v2.2) |
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| Lens | 36 - 133mm (35mm equiv) 3.7x optical zoom F2.8-5.8 |
28-112mm (35mm equiv) 4x optical zoom F2.8-5.8 |
| Image stabilization | Yes (Lens-Shift) | |
| Conversion lenses | Yes | |
| Digital zoom | up to 4x | |
| Focus | TTL | |
| AF area modes | Face Detection AiAF |
|
| AF lock | Yes (on/off selectable) | |
| AF assist lamp | Yes | |
| Focus distance | Closest focus distance 5 cm | Closest focus distance 2 cm |
| Metering | Evaluative (linked to Face Detection AF frame) Center-weighted average Spot (center or linked to Face Detection) |
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| ISO sensitivity | Auto High ISO Auto ISO 80 ISO 100 ISO 200 ISO 400 ISO 800 ISO 1600 |
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| AE lock | Yes (on/off selectable) | |
| Exposure compensation | +/- 2EV in 1/3 stop increments | |
| Shutter speed | 15-1/1600 sec | |
| Modes | Auto |
Auto Program AE Manual Special Scene Movie |
| Scene modes | Portrait |
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| White balance | Auto Daylight Cloudy Tungsten Fluorescent Fluorescent H Custom |
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| Self timer | 2 or 10sec, Custom or FaceSelf Timer |
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| Continuous shooting | Approx1.3 fps | Approx1.4 fps |
| Image parameters | My Colors (My Colors Off, Vivid, Neutral, Sepia, Black & White, Positive Film, Lighter Skin Tone, Darker Skin Tone, Vivid Blue, Vivid Green, Vivid Red, Custom Color) | |
| Flash | Auto, Flash On, Flash Off, Slow Sync, Red-eye reduction +/- 2EV in 1/3 stop increments Face Detection FE compensation Flash exposure lock Manual Power Adjustment Range (50cm - 4.6m (W) / 2.4m (T) |
Auto, Flash On, Flash Off, Slow Sync, Red-eye reduction Face Detection FE compensation Flash exposure lock Range 30cm - 4.2m (W) / 2.0m (T) |
| Viewfinder | Optical Viewfinder | |
| LCD monitor | 2.5" TFT 230,000 pixels 100% coverage Adjustable |
3.0" TFT 230,000 pixels 100% coverage Adjustable |
| Connectivity | USB Hi-Speed AV out (PAL / NTSC switchable) |
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| Print compliance | PictBridge | |
| Storage | SD, SDHC, MMC, MMCplus , HC MMCplus compatible | |
| Power | Rechargeable Li-ion Battery NB-5L | |
| Weight (no batt) | 160 g | 155 g |
| Dimensions | 98 x 62 x 28mm | 94 x 57 x 24mm |
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Pre-Photokina 2008: Canon has launched the Digital IXUS 980 IS and Digital IXUS 870 IS, including the first IXUS with manual controls. The models, which will be known as the SD 990 IS and SD 880 IS in North America, replace the Digital IXUS 960 IS and 860 IS respectively. The 14.7MP IXUS 980 features a 36 - 133mm equiv optical zoom, 2.5” LCD and is the first IXUS to offer manual controls. The 10MP IXUS 870 IS features a 28-112mm equiv optical zoom and a larger 3.0” LCD. Both cameras use Canon’s new DIGIC 4 processor for faster image processing.





