Canon Digital IXUS 860 IS vs. Canon EOS 30D

Comparison

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Digital IXUS 860 IS image
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EOS 30D image
Canon Digital IXUS 860 IS Canon EOS 30D
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Megapixels
8.00
8.19
Max. image resolution
3264 x 2448
3504 x 2336

Sensor

Sensor type
CCD
CMOS
Sensor size
1/2.5" (~ 5.75 x 4.32 mm)
22.5 x 15 mm
Sensor resolution
3262 x 2453
3506 x 2337
Diagonal
7.19 mm
27.04 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 : 13.59
(ratio)
Canon Digital IXUS 860 IS Canon EOS 30D
Surface area:
24.84 mm² vs 337.50 mm²
Difference: 312.66 mm² (1259%)
30D sensor is approx. 13.59x bigger than IXUS 860 IS sensor.
Pixel pitch
1.76 µm
6.42 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: 4.66 µm (265%)
Pixel pitch of 30D is approx. 265% higher than pixel pitch of IXUS 860 IS.
Pixel area
3.1 µm²
41.22 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:
vs
Pixel area difference: 38.12 µm² (1230%)
A pixel on Canon 30D sensor is approx. 1230% bigger than a pixel on Canon IXUS 860 IS.
Pixel density
32.18 MP/cm²
2.43 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: 29.75 µm (1224%)
Canon IXUS 860 IS has approx. 1224% higher pixel density than Canon 30D.
To learn about the accuracy of these numbers, click here.



Specs

Canon IXUS 860 IS
Canon 30D
Crop factor
6.02
1.6
Total megapixels
8.30
8.50
Effective megapixels
8.00
8.19
Optical zoom
3.8x
Digital zoom
Yes
No
ISO sensitivity
Auto, 80 ,100, 200, 400, 800, 1600
100, 200, 400, 800, 1600, 3200 (H)
RAW
Manual focus
Normal focus range
45 cm
Macro focus range
2 cm
Focal length (35mm equiv.)
28 - 105 mm
Aperture priority
No
Yes
Max. aperture
f2.8 - f5.8
Max. aperture (35mm equiv.)
f16.9 - f34.9
n/a
Metering
Multi, Center-weighted, Spot
Centre weighted, Multi-segment, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV, 1/2 EV steps)
Shutter priority
No
Yes
Min. shutter speed
15 sec
30 sec
Max. shutter speed
1/1600 sec
1/8000 sec
Built-in flash
External flash
Viewfinder
None
Optical (pentaprism)
White balance presets
5
6
Screen size
3"
2.5"
Screen resolution
230,000 dots
230,000 dots
Video capture
Max. video resolution
Storage types
SD/SDHC/MMC card
CompactFlash type I, CompactFlash type II, Microdrive
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion NB-5L battery
AA (4) batteries (NiMH recommended)
Weight
205 g
784 g
Dimensions
93 x 59 x 26 mm
144 x 106 x 74 mm
Year
2007
2006




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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 860 IS diagonal

The diagonal of IXUS 860 IS sensor is not 1/2.5 or 0.4" (10.2 mm) as you might expect, but approximately two thirds of that value - 7.19 mm. If you want to know why, see sensor sizes.

w = 5.75 mm
h = 4.32 mm
Diagonal =  5.75² + 4.32²   = 7.19 mm

Canon 30D diagonal

w = 22.50 mm
h = 15.00 mm
Diagonal =  22.50² + 15.00²   = 27.04 mm


Surface area

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

IXUS 860 IS sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 mm²

30D sensor area

Width = 22.50 mm
Height = 15.00 mm

Surface area = 22.50 × 15.00 = 337.50 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 860 IS pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 3262 pixels
Pixel pitch =   5.75  × 1000  = 1.76 µm
3262

30D pixel pitch

Sensor width = 22.50 mm
Sensor resolution width = 3506 pixels
Pixel pitch =   22.50  × 1000  = 6.42 µm
3506


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 860 IS pixel area

Pixel pitch = 1.76 µm

Pixel area = 1.76² = 3.1 µm²

30D pixel area

Pixel pitch = 6.42 µm

Pixel area = 6.42² = 41.22 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 860 IS pixel density

Sensor resolution width = 3262 pixels
Sensor width = 0.575 cm

Pixel density = (3262 / 0.575)² / 1000000 = 32.18 MP/cm²

30D pixel density

Sensor resolution width = 3506 pixels
Sensor width = 2.25 cm

Pixel density = (3506 / 2.25)² / 1000000 = 2.43 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 860 IS sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 8.00
r = 5.75/4.32 = 1.33
X =  8.00 × 1000000  = 2453
1.33
Resolution horizontal: X × r = 2453 × 1.33 = 3262
Resolution vertical: X = 2453

Sensor resolution = 3262 x 2453

30D sensor resolution

Sensor width = 22.50 mm
Sensor height = 15.00 mm
Effective megapixels = 8.19
r = 22.50/15.00 = 1.5
X =  8.19 × 1000000  = 2337
1.5
Resolution horizontal: X × r = 2337 × 1.5 = 3506
Resolution vertical: X = 2337

Sensor resolution = 3506 x 2337


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 860 IS crop factor

Sensor diagonal in mm = 7.19 mm
Crop factor =   43.27  = 6.02
7.19

30D crop factor

Sensor diagonal in mm = 27.04 mm
Crop factor =   43.27  = 1.6
27.04

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 860 IS equivalent aperture

Crop factor = 6.02
Aperture = f2.8 - f5.8

35-mm equivalent aperture = (f2.8 - f5.8) × 6.02 = f16.9 - f34.9

30D equivalent aperture

Aperture is a lens characteristic, so it's calculated only for fixed lens cameras. If you want to know the equivalent aperture for Canon 30D, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Canon 30D is 1.6

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