Panasonic Lumix DMC-FS2 vs. BenQ DC 3400

Comparison

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Lumix DMC-FS2 image
vs
DC 3400 image
Panasonic Lumix DMC-FS2 BenQ DC 3400
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Megapixels
7.38
2.00
Max. image resolution
3072 x 2304
2048 x 1536

Sensor

Sensor type
CCD
CMOS
Sensor size
1/2.5" (~ 5.75 x 4.32 mm)
1/3.2" (~ 4.5 x 3.37 mm)
Sensor resolution
3133 x 2356
1637 x 1222
Diagonal
7.19 mm
5.62 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
1.64 : 1
(ratio)
Panasonic Lumix DMC-FS2 BenQ DC 3400
Surface area:
24.84 mm² vs 15.17 mm²
Difference: 9.67 mm² (64%)
FS2 sensor is approx. 1.64x bigger than DC 3400 sensor.
Note: You are comparing cameras of different generations. There is a 3 year gap between Panasonic FS2 (2007) and BenQ DC 3400 (2004). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
1.84 µm
2.75 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: 0.91 µm (49%)
Pixel pitch of DC 3400 is approx. 49% higher than pixel pitch of FS2.
Pixel area
3.39 µm²
7.56 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:
vs
Pixel area difference: 4.17 µm² (123%)
A pixel on BenQ DC 3400 sensor is approx. 123% bigger than a pixel on Panasonic FS2.
Pixel density
29.69 MP/cm²
13.23 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: 16.46 µm (124%)
Panasonic FS2 has approx. 124% higher pixel density than BenQ DC 3400.
To learn about the accuracy of these numbers, click here.



Specs

Panasonic FS2
BenQ DC 3400
Crop factor
6.02
7.7
Total megapixels
Effective megapixels
Optical zoom
Yes
No
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100, 200, 400, 800, 1250
Auto
RAW
Manual focus
Normal focus range
50 cm
120 cm
Macro focus range
5 cm
30 cm
Focal length (35mm equiv.)
35 - 105 mm
Aperture priority
No
No
Max. aperture
f2.8 - f5
f3
Max. aperture (35mm equiv.)
f16.9 - f30.1
f23.1
Metering
Centre weighted
Centre weighted, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
Shutter priority
No
No
Min. shutter speed
60 sec
1/20 sec
Max. shutter speed
1/2000 sec
1/1000 sec
Built-in flash
External flash
Viewfinder
None
Optical
White balance presets
6
5
Screen size
2.5"
1.5"
Screen resolution
115,000 dots
Video capture
Max. video resolution
Storage types
SDHC, Secure Digital
Secure Digital
USB
USB 2.0 (480 Mbit/sec)
USB 1.1
HDMI
Wireless
GPS
Battery
Li-Ion
Li-Ion
Weight
125 g
135 g
Dimensions
94.1 x 51.4 x 24.2 mm
98 x 58 x 27 mm
Year
2007
2004




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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 FS2 diagonal

The diagonal of FS2 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

BenQ DC 3400 diagonal

The diagonal of DC 3400 sensor is not 1/3.2 or 0.31" (7.9 mm) as you might expect, but approximately two thirds of that value - 5.62 mm. If you want to know why, see sensor sizes.

w = 4.50 mm
h = 3.37 mm
Diagonal =  4.50² + 3.37²   = 5.62 mm


Surface area

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

FS2 sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 mm²

DC 3400 sensor area

Width = 4.50 mm
Height = 3.37 mm

Surface area = 4.50 × 3.37 = 15.17 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

FS2 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 3133 pixels
Pixel pitch =   5.75  × 1000  = 1.84 µm
3133

DC 3400 pixel pitch

Sensor width = 4.50 mm
Sensor resolution width = 1637 pixels
Pixel pitch =   4.50  × 1000  = 2.75 µm
1637


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

FS2 pixel area

Pixel pitch = 1.84 µm

Pixel area = 1.84² = 3.39 µm²

DC 3400 pixel area

Pixel pitch = 2.75 µm

Pixel area = 2.75² = 7.56 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

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

FS2 pixel density

Sensor resolution width = 3133 pixels
Sensor width = 0.575 cm

Pixel density = (3133 / 0.575)² / 1000000 = 29.69 MP/cm²

DC 3400 pixel density

Sensor resolution width = 1637 pixels
Sensor width = 0.45 cm

Pixel density = (1637 / 0.45)² / 1000000 = 13.23 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

FS2 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 7.38
r = 5.75/4.32 = 1.33
X =  7.38 × 1000000  = 2356
1.33
Resolution horizontal: X × r = 2356 × 1.33 = 3133
Resolution vertical: X = 2356

Sensor resolution = 3133 x 2356

DC 3400 sensor resolution

Sensor width = 4.50 mm
Sensor height = 3.37 mm
Effective megapixels = 2.00
r = 4.50/3.37 = 1.34
X =  2.00 × 1000000  = 1222
1.34
Resolution horizontal: X × r = 1222 × 1.34 = 1637
Resolution vertical: X = 1222

Sensor resolution = 1637 x 1222


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


FS2 crop factor

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

DC 3400 crop factor

Sensor diagonal in mm = 5.62 mm
Crop factor =   43.27  = 7.7
5.62

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).

FS2 equivalent aperture

Crop factor = 6.02
Aperture = f2.8 - f5

35-mm equivalent aperture = (f2.8 - f5) × 6.02 = f16.9 - f30.1

DC 3400 equivalent aperture

Crop factor = 7.7
Aperture = f3

35-mm equivalent aperture = (f3) × 7.7 = f23.1

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