Sony Cyber-shot DSC-W120 vs. Samsung WB150F

Comparison

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Cyber-shot DSC-W120 image
vs
WB150F image
Sony Cyber-shot DSC-W120 Samsung WB150F
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Megapixels
7.20
14.20
Max. image resolution
3072 x 2304
4608 x 3456

Sensor

Sensor type
CCD
CCD
Sensor size
1/2.5" (~ 5.75 x 4.32 mm)
1/2.3" (~ 6.16 x 4.62 mm)
Sensor resolution
3095 x 2327
4346 x 3268
Diagonal
7.19 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 : 1.15
(ratio)
Sony Cyber-shot DSC-W120 Samsung WB150F
Surface area:
24.84 mm² vs 28.46 mm²
Difference: 3.62 mm² (15%)
WB150F sensor is approx. 1.15x bigger than W120 sensor.
Note: You are comparing cameras of different generations. There is a 4 year gap between Sony W120 (2008) and Samsung WB150F (2012). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
1.86 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: 0.44 µm (31%)
Pixel pitch of W120 is approx. 31% higher than pixel pitch of WB150F.
Pixel area
3.46 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: 1.44 µm² (71%)
A pixel on Sony W120 sensor is approx. 71% bigger than a pixel on Samsung WB150F.
Pixel density
28.97 MP/cm²
49.78 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: 20.81 µm (72%)
Samsung WB150F has approx. 72% higher pixel density than Sony W120.
To learn about the accuracy of these numbers, click here.



Specs

Sony W120
Samsung WB150F
Crop factor
6.02
5.62
Total megapixels
Effective megapixels
14.20
Optical zoom
4x
18x
Digital zoom
Yes
Yes
ISO sensitivity
Auto
Auto, 80, 100, 200, 400, 800, 1600, 3200
RAW
Manual focus
Normal focus range
4 cm
80 cm
Macro focus range
4 cm
5 cm
Focal length (35mm equiv.)
32 - 128 mm
24 - 432 mm
Aperture priority
No
Yes
Max. aperture
f2.8 - f7.1
f3.2 - f5.8
Max. aperture (35mm equiv.)
f16.9 - f42.7
f18 - f32.6
Metering
Multi, Center-weighted, Spot
Multi, Center-weighted, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
Yes
Min. shutter speed
1 sec
16 sec
Max. shutter speed
1/1600 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
Optical (tunnel)
None
White balance presets
6
5
Screen size
2.5"
3"
Screen resolution
115,000 dots
460,000 dots
Video capture
Max. video resolution
1280x720 (30p/15p)
Storage types
Memory Stick Duo, Memory Stick Pro Duo
SD/SDHC/SDXC
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion (NP-BG1)
Lithium-Ion SLB-10A rechargeable battery
Weight
154 g
341 g
Dimensions
88 x 57 x 23 mm
122 x 90 x 40 mm
Year
2008
2012




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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

Sony W120 diagonal

The diagonal of W120 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

Samsung WB150F diagonal

The diagonal of WB150F 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.

W120 sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 mm²

WB150F 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

W120 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 3095 pixels
Pixel pitch =   5.75  × 1000  = 1.86 µm
3095

WB150F pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4346 pixels
Pixel pitch =   6.16  × 1000  = 1.42 µm
4346


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

W120 pixel area

Pixel pitch = 1.86 µm

Pixel area = 1.86² = 3.46 µm²

WB150F 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

W120 pixel density

Sensor resolution width = 3095 pixels
Sensor width = 0.575 cm

Pixel density = (3095 / 0.575)² / 1000000 = 28.97 MP/cm²

WB150F pixel density

Sensor resolution width = 4346 pixels
Sensor width = 0.616 cm

Pixel density = (4346 / 0.616)² / 1000000 = 49.78 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

W120 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 7.20
r = 5.75/4.32 = 1.33
X =  7.20 × 1000000  = 2327
1.33
Resolution horizontal: X × r = 2327 × 1.33 = 3095
Resolution vertical: X = 2327

Sensor resolution = 3095 x 2327

WB150F sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 14.20
r = 6.16/4.62 = 1.33
X =  14.20 × 1000000  = 3268
1.33
Resolution horizontal: X × r = 3268 × 1.33 = 4346
Resolution vertical: X = 3268

Sensor resolution = 4346 x 3268


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


W120 crop factor

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

WB150F 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).

W120 equivalent aperture

Crop factor = 6.02
Aperture = f2.8 - f7.1

35-mm equivalent aperture = (f2.8 - f7.1) × 6.02 = f16.9 - f42.7

WB150F equivalent aperture

Crop factor = 5.62
Aperture = f3.2 - f5.8

35-mm equivalent aperture = (f3.2 - f5.8) × 5.62 = f18 - f32.6

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