Olympus E-20 vs. Canon PowerShot SX110 IS
Comparison
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| Olympus E-20 | Canon PowerShot SX110 IS | ||||
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Megapixels
4.90
9.00
Max. image resolution
2560 x 1920
3456 x 2592
Sensor
Sensor type
CCD
CCD
Sensor size
2/3" (~ 8.8 x 6.6 mm)
1/2.3" (~ 6.16 x 4.62 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 »
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 »
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| Olympus E-20 | Canon PowerShot SX110 IS | |
Surface area:
| 58.08 mm² | vs | 28.46 mm² |
Difference: 29.62 mm² (104%)
E-20 sensor is approx. 2.04x bigger than SX110 IS sensor.
Note: You are comparing sensors of very different generations.
There is a gap of 7 years between Olympus E-20 (2001) and Canon SX110 IS (2008).
Seven years is a lot of time in terms
of technology, meaning newer sensors are overall much more
efficient than the older ones.
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.
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.
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.
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: 8.73 µm² (275%)
A pixel on Olympus E-20 sensor is approx. 275% bigger than a pixel on Canon SX110 IS.
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.
Higher pixel density means smaller pixels and lower pixel density means larger pixels.
To learn about the accuracy of these numbers,
click here.
Specs
Olympus E-20
Canon SX110 IS
Total megapixels
5.20
Effective megapixels
4.90
9.00
Optical zoom
4x
10x
Digital zoom
No
Yes
ISO sensitivity
80, 160, 320
Auto, 80 ,100, 200, 400, 800, 1600
RAW
Manual focus
Normal focus range
60 cm
50 cm
Macro focus range
20 cm
1 cm
Focal length (35mm equiv.)
35 - 140 mm
36 - 360 mm
Aperture priority
Yes
Yes
Max. aperture
f2.0 - f11.0
f2.8 - f4.3
Metering
Multi, Center-weighted, Spot
Multi, Center-weighted, Spot
Exposure compensation
±3 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
60 sec
15 sec
Max. shutter speed
1/640 sec
1/2500 sec
Built-in flash
External flash
Viewfinder
Optical (tunnel)
None
White balance presets
5
6
Screen size
1.8"
3"
Screen resolution
118,000 dots
230,000 dots
Video capture
Max. video resolution
Storage types
SmartMedia, Compact Flash Type I or II
SD/SDHC/MMC card
USB
USB 1.0
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
AA (2) batteries (NiMH recommended)
AA (2) batteries (NiMH recommended)
Weight
1190 g
285 g
Dimensions
129 x 161 x 104 mm
111 x 71 x 45 mm
Year
2001
2008
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Diagonal
Diagonal is calculated by the use of Pythagorean theorem:
where w = sensor width and h = sensor height
| Diagonal = √ | w² + h² |
Olympus E-20 diagonal
The diagonal of E-20 sensor is not 2/3 or 0.67" (16.9 mm) as you might expect, but approximately two thirds of
that value - 11 mm. If you want to know why, see
sensor sizes.
w = 8.80 mm
h = 6.60 mm
w = 8.80 mm
h = 6.60 mm
| Diagonal = √ | 8.80² + 6.60² | = 11.00 mm |
Canon SX110 IS diagonal
The diagonal of SX110 IS sensor is not 1/2.3 or 0.43" (11 mm) as you might expect, but approximately two thirds of
that value - 7.7 mm. If you want to know why, see
sensor sizes.
w = 6.16 mm
h = 4.62 mm
w = 6.16 mm
h = 4.62 mm
| Diagonal = √ | 6.16² + 4.62² | = 7.70 mm |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
E-20 sensor area
Width = 8.80 mm
Height = 6.60 mm
Surface area = 8.80 × 6.60 = 58.08 mm²
Height = 6.60 mm
Surface area = 8.80 × 6.60 = 58.08 mm²
SX110 IS sensor area
Width = 6.16 mm
Height = 4.62 mm
Surface area = 6.16 × 4.62 = 28.46 mm²
Height = 4.62 mm
Surface area = 6.16 × 4.62 = 28.46 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 |
E-20 pixel pitch
Sensor width = 8.80 mm
Sensor resolution width = 2552 pixels
Sensor resolution width = 2552 pixels
| Pixel pitch = | 8.80 | × 1000 | = 3.45 µm |
| 2552 |
SX110 IS pixel pitch
Sensor width = 6.16 mm
Sensor resolution width = 3459 pixels
Sensor resolution width = 3459 pixels
| Pixel pitch = | 6.16 | × 1000 | = 1.78 µm |
| 3459 |
Pixel area
The area of one pixel can be calculated by simply squaring the pixel pitch:
You could also divide sensor surface area with effective megapixels:
Pixel area = pixel pitch²
You could also divide sensor surface area with effective megapixels:
| Pixel area = | sensor surface area in mm² |
| effective megapixels |
E-20 pixel area
Pixel pitch = 3.45 µm
Pixel area = 3.45² = 11.9 µm²
Pixel area = 3.45² = 11.9 µm²
SX110 IS pixel area
Pixel pitch = 1.78 µm
Pixel area = 1.78² = 3.17 µm²
Pixel area = 1.78² = 3.17 µm²
Pixel density
Pixel density can be calculated with the following formula:
One could also use this 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 |
E-20 pixel density
Sensor resolution width = 2552 pixels
Sensor width = 0.88 cm
Pixel density = (2552 / 0.88)² / 1000000 = 8.41 MP/cm²
Sensor width = 0.88 cm
Pixel density = (2552 / 0.88)² / 1000000 = 8.41 MP/cm²
SX110 IS pixel density
Sensor resolution width = 3459 pixels
Sensor width = 0.616 cm
Pixel density = (3459 / 0.616)² / 1000000 = 31.53 MP/cm²
Sensor width = 0.616 cm
Pixel density = (3459 / 0.616)² / 1000000 = 31.53 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:
3. To get sensor resolution we then multiply X with the corresponding ratio:
Resolution horizontal: X × r
Resolution vertical: X
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 → |
|
Resolution horizontal: X × r
Resolution vertical: X
E-20 sensor resolution
Sensor width = 8.80 mm
Sensor height = 6.60 mm
Effective megapixels = 4.90
Resolution horizontal: X × r = 1919 × 1.33 = 2552
Resolution vertical: X = 1919
Sensor resolution = 2552 x 1919
Sensor height = 6.60 mm
Effective megapixels = 4.90
| r = 8.80/6.60 = 1.33 |
|
Resolution vertical: X = 1919
Sensor resolution = 2552 x 1919
SX110 IS sensor resolution
Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 9.00
Resolution horizontal: X × r = 2601 × 1.33 = 3459
Resolution vertical: X = 2601
Sensor resolution = 3459 x 2601
Sensor height = 4.62 mm
Effective megapixels = 9.00
| r = 6.16/4.62 = 1.33 |
|
Resolution vertical: X = 2601
Sensor resolution = 3459 x 2601
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 |
E-20 crop factor
Sensor diagonal in mm = 11.00 mm
| Crop factor = | 43.27 | = 3.93 |
| 11.00 |
SX110 IS crop factor
Sensor diagonal in mm = 7.70 mm
| Crop factor = | 43.27 | = 5.62 |
| 7.70 |
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).
E-20 equivalent aperture
Crop factor = 3.93
Aperture = f2.0 - f11.0
35-mm equivalent aperture = (f2.0 - f11.0) × 3.93 = f7.9 - f43.2
Aperture = f2.0 - f11.0
35-mm equivalent aperture = (f2.0 - f11.0) × 3.93 = f7.9 - f43.2
SX110 IS equivalent aperture
Crop factor = 5.62
Aperture = f2.8 - f4.3
35-mm equivalent aperture = (f2.8 - f4.3) × 5.62 = f15.7 - f24.2
Aperture = f2.8 - f4.3
35-mm equivalent aperture = (f2.8 - f4.3) × 5.62 = f15.7 - f24.2
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