Canon Digital IXUS 900 Ti vs. Canon Digital IXUS 980 IS

Comparison

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Canon Digital IXUS 900 Ti

Canon Digital IXUS 980 IS

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Megapixels

10.00

14.70

Max. image resolution

3648 x 2736

4416 x 3312

Sensor

Sensor type

CCD

Sensor size

1/1.8" (~ 7.11 x 5.33 mm)

1/1.7" (~ 7.53 x 5.64 mm)

Sensor resolution

3647 x 2742

4438 x 3312

Diagonal

8.89 mm

9.41 mm

Sensor size comparison

Sensor size is generally a good indicator of the quality of the camera. Sensors can vary greatly in size. As a general rule, the bigger the sensor, the better the image quality.

Bigger sensors are more effective because they have more surface area to capture light. An important factor when comparing digital cameras is also camera generation. Generally, newer sensors will outperform the older.

Learn more about sensor sizes »

Actual sensor size

Note: Actual size is set to screen → change »

	vs
1	:	1.12
(ratio)

Canon Digital IXUS 900 Ti		Canon Digital IXUS 980 IS

Surface area:

37.90 mm²

42.47 mm²

Difference: 4.57 mm² (12%)

IXUS 980 IS sensor is approx. 1.12x bigger than IXUS 900 Ti sensor.

Note: You are comparing cameras of different generations. There is a 2 year gap between Canon IXUS 900 Ti (2006) and Canon IXUS 980 IS (2008). All things being equal, newer sensor generations generally outperform the older.

Pixel pitch

1.95 µm

1.7 µm

Pixel pitch tells you the distance from the center of one pixel (photosite) to the center of the next. It tells you how close the pixels are to each other.

The bigger the pixel pitch, the further apart they are and the bigger each pixel is. Bigger pixels tend to have better signal to noise ratio and greater dynamic range.

Difference: 0.25 µm (15%)

Pixel pitch of IXUS 900 Ti is approx. 15% higher than pixel pitch of IXUS 980 IS.

Pixel area

3.8 µm²

2.89 µm²

Pixel or photosite area affects how much light per pixel can be gathered. The larger it is the more light can be collected by a single pixel.

Larger pixels have the potential to collect more photons, resulting in greater dynamic range, while smaller pixels provide higher resolutions (more detail) for a given sensor size.

Relative pixel sizes:

Pixel area difference: 0.91 µm² (31%)

A pixel on Canon IXUS 900 Ti sensor is approx. 31% bigger than a pixel on Canon IXUS 980 IS.

Pixel density

26.31 MP/cm²

34.74 MP/cm²

Pixel density tells you how many million pixels fit or would fit in one square cm of the sensor.

Higher pixel density means smaller pixels and lower pixel density means larger pixels.

Difference: 8.43 µm (32%)

Canon IXUS 980 IS has approx. 32% higher pixel density than Canon IXUS 900 Ti.

To learn about the accuracy of these numbers, click here.

Specs

Canon IXUS 900 Ti

Canon IXUS 980 IS

Crop factor

4.87

4.6

Total megapixels

10.30

Effective megapixels

10.00

14.70

Optical zoom

3.7x

Digital zoom

Yes

ISO sensitivity

Auto, 80 ,100, 200, 400, 800, 1600

RAW

Manual focus

Normal focus range

45 cm

50 cm

Macro focus range

5 cm

Focal length (35mm equiv.)

37 - 111 mm

36 - 133 mm

Aperture priority

Max. aperture

f2.8 - f4.9

f2.8 - f5.8

Max. aperture (35mm equiv.)

f13.6 - f23.9

f12.9 - f26.7

Metering

Multi, Center-weighted, Spot

Exposure compensation

±2 EV (in 1/3 EV steps)

Shutter priority

Min. shutter speed

15 sec

Max. shutter speed

1/2000 sec

1/1600 sec

Built-in flash

External flash

Viewfinder

Optical (tunnel)

White balance presets

Screen size

2.5"

Screen resolution

230,000 dots

Video capture

Max. video resolution

Storage types

SD/MMC card

SD/SDHC/MMC card

USB

USB 2.0 (480 Mbit/sec)

HDMI

Wireless

GPS

Battery

Lithium-Ion NB-5L battery

Weight

205 g

Dimensions

91 x 57 x 28 mm

98 x 62 x 28 mm

Year

2006

2008

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Diagonal

Diagonal is calculated by the use of Pythagorean theorem:

Diagonal = √

w² + h²

where w = sensor width and h = sensor height

Canon IXUS 900 Ti diagonal

The diagonal of IXUS 900 Ti sensor is not 1/1.8 or 0.56" (14.1 mm) as you might expect, but approximately two thirds of that value - 8.89 mm. If you want to know why, see sensor sizes.

w = 7.11 mm
h = 5.33 mm

Diagonal = √

7.11² + 5.33²

= 8.89 mm

Canon IXUS 980 IS diagonal

The diagonal of IXUS 980 IS sensor is not 1/1.7 or 0.59" (14.9 mm) as you might expect, but approximately two thirds of that value - 9.41 mm. If you want to know why, see sensor sizes.

w = 7.53 mm
h = 5.64 mm

Diagonal = √

7.53² + 5.64²

= 9.41 mm

Surface area

Surface area is calculated by multiplying the width and the height of a sensor.

IXUS 900 Ti sensor area

Width = 7.11 mm
Height = 5.33 mm

Surface area = 7.11 × 5.33 = 37.90 mm²

IXUS 980 IS sensor area

Width = 7.53 mm
Height = 5.64 mm

Surface area = 7.53 × 5.64 = 42.47 mm²

Pixel pitch

Pixel pitch is the distance from the center of one pixel to the center of the next measured in micrometers (µm). It can be calculated with the following formula:

Pixel pitch =	sensor width in mm	× 1000
	sensor resolution width in pixels

IXUS 900 Ti pixel pitch

Sensor width = 7.11 mm
Sensor resolution width = 3647 pixels

Pixel pitch =	7.11	× 1000	= 1.95 µm
	3647

IXUS 980 IS pixel pitch

Sensor width = 7.53 mm
Sensor resolution width = 4438 pixels

Pixel pitch =	7.53	× 1000	= 1.7 µm
	4438

Pixel area

The area of one pixel can be calculated by simply squaring the pixel pitch:

Pixel area = pixel pitch²

You could also divide sensor surface area with effective megapixels:

Pixel area =	sensor surface area in mm²
	effective megapixels

IXUS 900 Ti pixel area

Pixel pitch = 1.95 µm

Pixel area = 1.95² = 3.8 µm²

IXUS 980 IS pixel area

Pixel pitch = 1.7 µm

Pixel area = 1.7² = 2.89 µm²

Pixel density

Pixel density can be calculated with the following formula:

Pixel density = (	sensor resolution width in pixels	)² / 1000000
	sensor width in cm

One could also use this formula:

Pixel density =	effective megapixels × 1000000	/ 10000
	sensor surface area in mm²

IXUS 900 Ti pixel density

Sensor resolution width = 3647 pixels
Sensor width = 0.711 cm

Pixel density = (3647 / 0.711)² / 1000000 = 26.31 MP/cm²

IXUS 980 IS pixel density

Sensor resolution width = 4438 pixels
Sensor width = 0.753 cm

Pixel density = (4438 / 0.753)² / 1000000 = 34.74 MP/cm²

Sensor resolution

Sensor resolution is calculated from sensor size and effective megapixels. It's slightly higher than maximum (not interpolated) image resolution which is usually stated on camera specifications. Sensor resolution is used in pixel pitch, pixel area, and pixel density formula. For sake of simplicity, we're going to calculate it in 3 stages.

1. First we need to find the ratio between horizontal and vertical length by dividing the former with the latter (aspect ratio). It's usually 1.33 (4:3) or 1.5 (3:2), but not always.

2. With the ratio (r) known we can calculate the X from the formula below, where X is a vertical number of pixels:

(X × r) × X = effective megapixels × 1000000 →

X = √	effective megapixels × 1000000
	r

3. To get sensor resolution we then multiply X with the corresponding ratio:

Resolution horizontal: X × r
Resolution vertical: X

IXUS 900 Ti sensor resolution

Sensor width = 7.11 mm
Sensor height = 5.33 mm
Effective megapixels = 10.00

r = 7.11/5.33 = 1.33

X = √	10.00 × 1000000	= 2742
	1.33

Resolution horizontal: X × r = 2742 × 1.33 = 3647
Resolution vertical: X = 2742

Sensor resolution = 3647 x 2742

IXUS 980 IS sensor resolution

Sensor width = 7.53 mm
Sensor height = 5.64 mm
Effective megapixels = 14.70

r = 7.53/5.64 = 1.34

X = √	14.70 × 1000000	= 3312
	1.34

Resolution horizontal: X × r = 3312 × 1.34 = 4438
Resolution vertical: X = 3312

Sensor resolution = 4438 x 3312

Crop factor

Crop factor or focal length multiplier is calculated by dividing the diagonal of 35 mm film (43.27 mm) with the diagonal of the sensor.

Crop factor =	43.27 mm
	sensor diagonal in mm

IXUS 900 Ti crop factor

Sensor diagonal in mm = 8.89 mm

Crop factor =	43.27	= 4.87
	8.89

IXUS 980 IS crop factor

Sensor diagonal in mm = 9.41 mm

Crop factor =	43.27	= 4.6
	9.41

35 mm equivalent aperture

Equivalent aperture (in 135 film terms) is calculated by multiplying lens aperture with crop factor (a.k.a. focal length multiplier).

IXUS 900 Ti equivalent aperture

Crop factor = 4.87
Aperture = f2.8 - f4.9

35-mm equivalent aperture = (f2.8 - f4.9) × 4.87 = f13.6 - f23.9

IXUS 980 IS equivalent aperture

Crop factor = 4.6
Aperture = f2.8 - f5.8

35-mm equivalent aperture = (f2.8 - f5.8) × 4.6 = f12.9 - f26.7

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