Olympus SH-25MR vs. Canon PowerShot S100

Comparison

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SH-25MR image
vs
PowerShot S100 image
Olympus SH-25MR Canon PowerShot S100
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Megapixels
16.80
12.10
Max. image resolution
4608 x 3456
4000 x 3000

Sensor

Sensor type
CMOS
CMOS
Sensor size
1/2.3" (~ 6.16 x 4.62 mm)
1/1.7" (~ 7.53 x 5.64 mm)
Sensor resolution
4727 x 3554
4027 x 3005
Diagonal
7.70 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 : 1.49
(ratio)
Olympus SH-25MR Canon PowerShot S100
Surface area:
28.46 mm² vs 42.47 mm²
Difference: 14.01 mm² (49%)
S100 sensor is approx. 1.49x bigger than SH-25MR sensor.
Pixel pitch
1.3 µm
1.87 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: 0.57 µm (44%)
Pixel pitch of S100 is approx. 44% higher than pixel pitch of SH-25MR.
Pixel area
1.69 µm²
3.5 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: 1.81 µm² (107%)
A pixel on Canon S100 sensor is approx. 107% bigger than a pixel on Olympus SH-25MR.
Pixel density
58.89 MP/cm²
28.6 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: 30.29 µm (106%)
Olympus SH-25MR has approx. 106% higher pixel density than Canon S100.
To learn about the accuracy of these numbers, click here.



Specs

Olympus SH-25MR
Canon S100
Crop factor
5.62
4.6
Total megapixels
13.30
Effective megapixels
12.10
Optical zoom
Yes
5x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 80, 100, 200, 400, 800, 1600, 3200, 6400
Auto, 80 - 6400
RAW
Manual focus
Normal focus range
10 cm
30 cm
Macro focus range
1 cm
3 cm
Focal length (35mm equiv.)
24 - 300 mm
24 - 120 mm
Aperture priority
No
Yes
Max. aperture
f3.0 - f5.9
f2.0 - f5.9
Max. aperture (35mm equiv.)
f16.9 - f33.2
f9.2 - f27.1
Metering
Centre weighted, Multi-segment, Spot
Multi, Center-weighted, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±3 EV (in 1/3 EV steps)
Shutter priority
No
Yes
Min. shutter speed
4 sec
15 sec
Max. shutter speed
1/2000 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
None
None
White balance presets
7
Screen size
3"
3"
Screen resolution
460,000 dots
461,000 dots
Video capture
Max. video resolution
Storage types
SDHC, SDXC, Secure Digital
SDHC, SDXC, Secure Digital
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Li-Ion
Lithium-Ion NB-5L rechargeable battery
Weight
208 g
198 g
Dimensions
109.2 x 61.8 x 30.6 mm
98.9 x 59.8 x 26.7 mm
Year
2012
2011




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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

Olympus SH-25MR diagonal

The diagonal of SH-25MR 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
Diagonal =  6.16² + 4.62²   = 7.70 mm

Canon S100 diagonal

The diagonal of S100 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.

SH-25MR sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

S100 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

SH-25MR pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4727 pixels
Pixel pitch =   6.16  × 1000  = 1.3 µm
4727

S100 pixel pitch

Sensor width = 7.53 mm
Sensor resolution width = 4027 pixels
Pixel pitch =   7.53  × 1000  = 1.87 µm
4027


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

SH-25MR pixel area

Pixel pitch = 1.3 µm

Pixel area = 1.3² = 1.69 µm²

S100 pixel area

Pixel pitch = 1.87 µm

Pixel area = 1.87² = 3.5 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

SH-25MR pixel density

Sensor resolution width = 4727 pixels
Sensor width = 0.616 cm

Pixel density = (4727 / 0.616)² / 1000000 = 58.89 MP/cm²

S100 pixel density

Sensor resolution width = 4027 pixels
Sensor width = 0.753 cm

Pixel density = (4027 / 0.753)² / 1000000 = 28.6 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

SH-25MR sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 16.80
r = 6.16/4.62 = 1.33
X =  16.80 × 1000000  = 3554
1.33
Resolution horizontal: X × r = 3554 × 1.33 = 4727
Resolution vertical: X = 3554

Sensor resolution = 4727 x 3554

S100 sensor resolution

Sensor width = 7.53 mm
Sensor height = 5.64 mm
Effective megapixels = 12.10
r = 7.53/5.64 = 1.34
X =  12.10 × 1000000  = 3005
1.34
Resolution horizontal: X × r = 3005 × 1.34 = 4027
Resolution vertical: X = 3005

Sensor resolution = 4027 x 3005


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


SH-25MR crop factor

Sensor diagonal in mm = 7.70 mm
Crop factor =   43.27  = 5.62
7.70

S100 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).

SH-25MR equivalent aperture

Crop factor = 5.62
Aperture = f3.0 - f5.9

35-mm equivalent aperture = (f3.0 - f5.9) × 5.62 = f16.9 - f33.2

S100 equivalent aperture

Crop factor = 4.6
Aperture = f2.0 - f5.9

35-mm equivalent aperture = (f2.0 - f5.9) × 4.6 = f9.2 - f27.1

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