Olympus mju 800 black vs. Sony Cyber-shot DSC-W380

Comparison

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mju 800 black image
vs
Cyber-shot DSC-W380 image
Olympus mju 800 black Sony Cyber-shot DSC-W380
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Megapixels
8.30
14.10
Max. image resolution
3264 x 2448
4320 x 3240

Sensor

Sensor type
CCD
CCD
Sensor size
1/1.8" (~ 7.11 x 5.33 mm)
1/2.3" (~ 6.16 x 4.62 mm)
Sensor resolution
3322 x 2498
4330 x 3256
Diagonal
8.89 mm
7.70 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
1.33 : 1
(ratio)
Olympus mju 800 black Sony Cyber-shot DSC-W380
Surface area:
37.90 mm² vs 28.46 mm²
Difference: 9.44 mm² (33%)
mju 800 black sensor is approx. 1.33x bigger than W380 sensor.
Note: You are comparing cameras of different generations. There is a 5 year gap between Olympus mju 800 black (2005) and Sony W380 (2010). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
2.14 µm
1.42 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: 0.72 µm (51%)
Pixel pitch of mju 800 black is approx. 51% higher than pixel pitch of W380.
Pixel area
4.58 µm²
2.02 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: 2.56 µm² (127%)
A pixel on Olympus mju 800 black sensor is approx. 127% bigger than a pixel on Sony W380.
Pixel density
21.83 MP/cm²
49.41 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: 27.58 µm (126%)
Sony W380 has approx. 126% higher pixel density than Olympus mju 800 black.
To learn about the accuracy of these numbers, click here.



Specs

Olympus mju 800 black
Sony W380
Crop factor
4.87
5.62
Total megapixels
Effective megapixels
Optical zoom
Yes
5x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 64, 100, 200, 400, 800, 1600
Auto, 100, 200, 400, 800, 1600, 3200
RAW
Manual focus
Normal focus range
50 cm
50 cm
Macro focus range
3 cm
5 cm
Focal length (35mm equiv.)
38 - 114 mm
24 - 120 mm
Aperture priority
Yes
No
Max. aperture
f2.8 - f4.9
f2.4 - f5.9
Max. aperture (35mm equiv.)
f13.6 - f23.9
f13.5 - f33.2
Metering
ESP Digital
Centre weighted
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
Yes
No
Min. shutter speed
4 sec
2 sec
Max. shutter speed
1/2000 sec
1/1600 sec
Built-in flash
External flash
Viewfinder
None
None
White balance presets
5
7
Screen size
2.5"
2.7"
Screen resolution
215,000 dots
230,400 dots
Video capture
Max. video resolution
Storage types
xD Picture card
Memory Stick Duo, Memory Stick Pro Duo, SDHC, Secure Digital
USB
USB 1.1
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Li-Ion
Lithium-Ion NP-BN1 battery
Weight
181 g
124 g
Dimensions
103 x 57.5 x 33 mm
92 x 52 x 20 mm
Year
2005
2010




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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 mju 800 black diagonal

The diagonal of mju 800 black 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

Sony W380 diagonal

The diagonal of W380 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


Surface area

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

mju 800 black sensor area

Width = 7.11 mm
Height = 5.33 mm

Surface area = 7.11 × 5.33 = 37.90 mm²

W380 sensor area

Width = 6.16 mm
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

mju 800 black pixel pitch

Sensor width = 7.11 mm
Sensor resolution width = 3322 pixels
Pixel pitch =   7.11  × 1000  = 2.14 µm
3322

W380 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4330 pixels
Pixel pitch =   6.16  × 1000  = 1.42 µm
4330


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

mju 800 black pixel area

Pixel pitch = 2.14 µm

Pixel area = 2.14² = 4.58 µm²

W380 pixel area

Pixel pitch = 1.42 µm

Pixel area = 1.42² = 2.02 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

mju 800 black pixel density

Sensor resolution width = 3322 pixels
Sensor width = 0.711 cm

Pixel density = (3322 / 0.711)² / 1000000 = 21.83 MP/cm²

W380 pixel density

Sensor resolution width = 4330 pixels
Sensor width = 0.616 cm

Pixel density = (4330 / 0.616)² / 1000000 = 49.41 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

mju 800 black sensor resolution

Sensor width = 7.11 mm
Sensor height = 5.33 mm
Effective megapixels = 8.30
r = 7.11/5.33 = 1.33
X =  8.30 × 1000000  = 2498
1.33
Resolution horizontal: X × r = 2498 × 1.33 = 3322
Resolution vertical: X = 2498

Sensor resolution = 3322 x 2498

W380 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 14.10
r = 6.16/4.62 = 1.33
X =  14.10 × 1000000  = 3256
1.33
Resolution horizontal: X × r = 3256 × 1.33 = 4330
Resolution vertical: X = 3256

Sensor resolution = 4330 x 3256


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


mju 800 black crop factor

Sensor diagonal in mm = 8.89 mm
Crop factor =   43.27  = 4.87
8.89

W380 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).

mju 800 black 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

W380 equivalent aperture

Crop factor = 5.62
Aperture = f2.4 - f5.9

35-mm equivalent aperture = (f2.4 - f5.9) × 5.62 = f13.5 - f33.2

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