Panasonic Lumix DMC-TZ4 vs. Samsung Galaxy Camera

Comparison

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Lumix DMC-TZ4 image
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Galaxy Camera image
Panasonic Lumix DMC-TZ4 Samsung Galaxy Camera
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Megapixels
8.10
16.30
Max. image resolution
3264 x 2448
4608 x 3456

Sensor

Sensor type
CCD
CMOS
Sensor size
1/2.5" (~ 5.75 x 4.32 mm)
1/2.3" (~ 6.16 x 4.62 mm)
Sensor resolution
3282 x 2468
4656 x 3501
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)
Panasonic Lumix DMC-TZ4 Samsung Galaxy Camera
Surface area:
24.84 mm² vs 28.46 mm²
Difference: 3.62 mm² (15%)
Galaxy Camera sensor is approx. 1.15x bigger than TZ4 sensor.
Note: You are comparing cameras of different generations. There is a 4 year gap between Panasonic TZ4 (2008) and Samsung Galaxy Camera (2012). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
1.75 µm
1.32 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: 0.43 µm (33%)
Pixel pitch of TZ4 is approx. 33% higher than pixel pitch of Galaxy Camera.
Pixel area
3.06 µm²
1.74 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: 1.32 µm² (76%)
A pixel on Panasonic TZ4 sensor is approx. 76% bigger than a pixel on Samsung Galaxy Camera.
Pixel density
32.58 MP/cm²
57.13 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: 24.55 µm (75%)
Samsung Galaxy Camera has approx. 75% higher pixel density than Panasonic TZ4.
To learn about the accuracy of these numbers, click here.



Specs

Panasonic TZ4
Samsung Galaxy Camera
Crop factor
6.02
5.62
Total megapixels
8.30
17.00
Effective megapixels
8.10
16.30
Optical zoom
10x
21x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100, 200, 400, 800, 1600, 6400
Auto, 100, 200, 400, 800, 1600, 3200
RAW
Manual focus
Normal focus range
50 cm
80 cm
Macro focus range
5 cm
10 cm
Focal length (35mm equiv.)
28 - 280 mm
23 - 481 mm
Aperture priority
No
Yes
Max. aperture
f3.3 - f4.9
f2.8 - f5.9
Max. aperture (35mm equiv.)
f19.9 - f29.5
f15.7 - f33.2
Metering
Centre weighted, Intelligent Multiple, Spot
Multi, Spot, Center-weighted
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
Yes
Min. shutter speed
60 sec
16 sec
Max. shutter speed
1/2000 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
None
None
White balance presets
6
5
Screen size
2.5"
4.8"
Screen resolution
230,400 dots
921,600 dots
Video capture
Max. video resolution
Storage types
SDHC, Secure Digital
micro SD/micro SDHC/micro SDXC
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion rechargeable
Weight
208 g
300 g
Dimensions
103.3 x 59.3 x 36.2 mm
128.7 x 70.8 x 19.1 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

Panasonic TZ4 diagonal

The diagonal of TZ4 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 Galaxy Camera diagonal

The diagonal of Galaxy Camera 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.

TZ4 sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 mm²

Galaxy Camera 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

TZ4 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 3282 pixels
Pixel pitch =   5.75  × 1000  = 1.75 µm
3282

Galaxy Camera pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4656 pixels
Pixel pitch =   6.16  × 1000  = 1.32 µm
4656


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

TZ4 pixel area

Pixel pitch = 1.75 µm

Pixel area = 1.75² = 3.06 µm²

Galaxy Camera pixel area

Pixel pitch = 1.32 µm

Pixel area = 1.32² = 1.74 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

TZ4 pixel density

Sensor resolution width = 3282 pixels
Sensor width = 0.575 cm

Pixel density = (3282 / 0.575)² / 1000000 = 32.58 MP/cm²

Galaxy Camera pixel density

Sensor resolution width = 4656 pixels
Sensor width = 0.616 cm

Pixel density = (4656 / 0.616)² / 1000000 = 57.13 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

TZ4 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 8.10
r = 5.75/4.32 = 1.33
X =  8.10 × 1000000  = 2468
1.33
Resolution horizontal: X × r = 2468 × 1.33 = 3282
Resolution vertical: X = 2468

Sensor resolution = 3282 x 2468

Galaxy Camera sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 16.30
r = 6.16/4.62 = 1.33
X =  16.30 × 1000000  = 3501
1.33
Resolution horizontal: X × r = 3501 × 1.33 = 4656
Resolution vertical: X = 3501

Sensor resolution = 4656 x 3501


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


TZ4 crop factor

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

Galaxy Camera 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).

TZ4 equivalent aperture

Crop factor = 6.02
Aperture = f3.3 - f4.9

35-mm equivalent aperture = (f3.3 - f4.9) × 6.02 = f19.9 - f29.5

Galaxy Camera equivalent aperture

Crop factor = 5.62
Aperture = f2.8 - f5.9

35-mm equivalent aperture = (f2.8 - f5.9) × 5.62 = f15.7 - f33.2

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