Panasonic Lumix DMC-TZ25 vs. Sony Cybershot DSC WX150

Comparison

Lumix DMC-TZ25 image
vs.
Cybershot DSC WX150 image

Comparison

Panasonic Lumix DMC-TZ25 Sony Cybershot DSC WX150
Megapixels
12.10 18.20
Max. resolution
4000 x 3000 4896 x 3672
Price
Amazon, B&H Photo, Adorama Amazon, B&H Photo, Adorama

Sensor

Sensor type
CMOS BSI CMOS
Sensor size
1/2.3" (~ 6.16 x 4.62 mm) 1/2.3" (~ 6.16 x 4.62 mm)
Sensor resolution
4011 x 3016  4920 x 3699 
Diagonal
7.70 mm  7.70 mm 
Surface area
28.46 mm²  28.46 mm² 
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 sizes:
Panasonic Lumix DMC-TZ25
vs.
Sony Cybershot DSC WX150
 
Surface area:
Panasonic Lumix DMC-TZ25
Sony Cybershot DSC WX150
Difference: 0 mm² (0%)
Panasonic Lumix DMC-TZ25 and Sony Cybershot DSC WX150 have the same surface area.
Pixel pitch
1.54 µm  1.25 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.
Pixel pitch
Panasonic Lumix DMC-TZ25
Sony Cybershot DSC WX150
Difference: 0.29 µm (23%)
Pixel pitch of Panasonic Lumix DMC-TZ25 is approx. 23% higher than pixel pitch of Sony Cybershot DSC WX150.
Pixel area
2.37 µm²  1.56 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:
Panasonic Lumix DMC-TZ25
vs.
Sony Cybershot DSC WX150
Pixel area difference: 0.81 µm² (52%)
A pixel on Panasonic Lumix DMC-TZ25 sensor is approx. 52% bigger than a pixel on Sony Cybershot DSC WX150.
Pixel density
42.4 MP/cm²  63.79 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.
Pixel density
Panasonic Lumix DMC-TZ25
Sony Cybershot DSC WX150
Difference: 21.39 MP/cm² (50%)
Sony Cybershot DSC WX150 has approx. 50% higher pixel density than Panasonic Lumix DMC-TZ25.
To learn about the accuracy of these numbers, click here.

Other specifications

Crop factor
5.62  5.62 
Total megapixels
12.50 n/a
Effective megapixels
12.10 n/a
Optical zoom
16x 10x
Digital zoom
Yes Yes
Iso
Auto, Hi Auto, (1600-6400), 100, 200, 400, 800, 1600. 3200 Auto, 100, 200, 400, 800, 1600, 3200, 6400, 12800
Auto focus
Yes Yes
Manual focus
No No
Normal focus range
50 cm n/a
Macro focus range
3 cm 5 cm
Focal length (35mm equiv.)
24 - 384 mm 25 - 250 mm
Aperture priority
Yes No
Aperture
f3.3 - f5.9 f3.3 - f5.9
Aperture (35mm equiv.)
f18.5 - f33.2  f18.5 - f33.2 
Metering
Centre weighted, Multi-segment, Spot Multi, Center-weighted, Spot
Exposure compensation
-2EV - +2EV with 1/3EV steps ±2 EV (at 1/3 EV steps)
Shutter priority
Yes No
Min. shutter speed
15 sec 30 sec
Max. shutter speed
1/4000 sec 1/1600 sec
Flash modes
Anti red-eye, Auto, Fill in, Off, Slow flash Auto, On, Off, Slow Sync
Built-in flash
Yes Yes
External flash
No No
Viewfinder
None None
White balance presets
4 7
LCD display
Yes Yes
LCD size
3" 3"
LCD resolution
460,000 460,800
Min. image resolution
1504 x 1504 640 x 480
Selftimer
Yes Yes
Storage types
SDHC, SDXC, Secure Digital SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
USB
USB 2.0 Hi-Speed USB 2.0 (480 Mbit/sec)
Batteries
Lithium-Ion rechargeable battery & charger Lithium-Ion NP-BN battery and charger
Weight
208g 133g
Dimensions
105x58x33 mm 95x56x22 mm
Year
2012 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

Panasonic Lumix DMC-TZ25 diagonal

The diagonal of Panasonic Lumix DMC-TZ25 image sensor is not 1/2.3 inch as you might expect, but approximately two thirds of that value. 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

Sony Cybershot DSC WX150 diagonal

The diagonal of Sony Cybershot DSC WX150 image sensor is not 1/2.3 inch as you might expect, but approximately two thirds of that value. 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.

Panasonic Lumix DMC-TZ25 surface area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

Sony Cybershot DSC WX150 surface 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

Panasonic Lumix DMC-TZ25 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4011 pixels
Pixel pitch =   6.16  × 1000  = 1.54 µm
4011

Sony Cybershot DSC WX150 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4920 pixels
Pixel pitch =   6.16  × 1000  = 1.25 µm
4920


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

Panasonic Lumix DMC-TZ25 pixel area

Pixel pitch = 1.54 µm

Pixel area = 1.54² = 2.37 µm²

Sony Cybershot DSC WX150 pixel area

Pixel pitch = 1.25 µm

Pixel area = 1.25² = 1.56 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

You could also use this formula:
Pixel density =   effective megapixels × 1000000  / 10000
sensor surface area in mm²

Panasonic Lumix DMC-TZ25 pixel density

Sensor resolution width = 4011 pixels
Sensor width = 0.616 cm

Pixel density = (4011 / 0.616)² / 1000000 = 42.4 MP/cm²

Sony Cybershot DSC WX150 pixel density

Sensor resolution width = 4920 pixels
Sensor width = 0.616 cm

Pixel density = (4920 / 0.616)² / 1000000 = 63.79 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. 22.8 × 15.5 sensor for example has a ratio of 1.47.

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

Panasonic Lumix DMC-TZ25 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 12.10
r = 6.16/4.62 = 1.33
X =  12.10 × 1000000  = 3016
1.33
Resolution horizontal: X × r = 3016 × 1.33 = 4011
Resolution vertical: X = 3016

Sensor resolution = 4011 x 3016

Sony Cybershot DSC WX150 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 18.20
r = 6.16/4.62 = 1.33
X =  18.20 × 1000000  = 3699
1.33
Resolution horizontal: X × r = 3699 × 1.33 = 4920
Resolution vertical: X = 3699

Sensor resolution = 4920 x 3699


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


Panasonic Lumix DMC-TZ25 crop factor

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

Sony Cybershot DSC WX150 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).

Panasonic Lumix DMC-TZ25 equivalent aperture

Crop factor = 5.62
Aperture = f3.3 - f5.9

35-mm equivalent aperture = (f3.3 - f5.9) × 5.62 = f18.5 - f33.2

Sony Cybershot DSC WX150 equivalent aperture

Crop factor = 5.62
Aperture = f3.3 - f5.9

35-mm equivalent aperture = (f3.3 - f5.9) × 5.62 = f18.5 - f33.2


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