Samsung Digimax 401 vs. Panasonic Lumix DMC-LS1

Comparison

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Samsung Digimax 401

Panasonic Lumix DMC-LS1

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Megapixels

4.00

Max. image resolution

2304 x 1728

Sensor

Sensor type

CCD

Sensor size

1/2.5" (~ 5.75 x 4.32 mm)

Sensor resolution

2306 x 1734

Diagonal

7.19 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
(ratio)

Samsung Digimax 401		Panasonic Lumix DMC-LS1

Surface area:

24.84 mm²

Difference: 0 mm² (0%)

401 and LS1 sensors are the same size.

Pixel pitch

2.49 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 µm (0%)

401 and LS1 have the same pixel pitch.

Pixel area

6.2 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:

Pixel area difference: 0 µm² (0%)

Samsung 401 and Panasonic LS1 have the same pixel area.

Pixel density

16.08 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: 0 µm (0%)

Samsung 401 and Panasonic LS1 have the same pixel density.

To learn about the accuracy of these numbers, click here.

Specs

Samsung 401

Panasonic LS1

Crop factor

6.02

Total megapixels

4.10

4.20

Effective megapixels

4.00

Optical zoom

0.9x

Digital zoom

Yes

ISO sensitivity

Auto

Auto, 64, 100, 200, 400

RAW

Manual focus

Normal focus range

100 cm

50 cm

Macro focus range

19 cm

5 cm

Focal length (35mm equiv.)

35 - 33 mm

35 - 105 mm

Aperture priority

Max. aperture

f2.9

f2.8 - f5

Max. aperture (35mm equiv.)

f17.5

f16.9 - f30.1

Metering

Multi Spot, Spot

Multi-pattern

Exposure compensation

±2 EV (in 1/2 EV steps)

±2 EV (in 1/3 EV steps)

Shutter priority

Min. shutter speed

5 sec

8 sec

Max. shutter speed

1/1000 sec

1/2000 sec

Built-in flash

External flash

Viewfinder

Optical (tunnel)

None

White balance presets

Screen size

1.6"

Screen resolution

117,600 dots

85,000 dots

Video capture

Max. video resolution

Storage types

MultiMedia, Secure Digital

Secure Digital

USB

USB 1.0

HDMI

Wireless

GPS

Battery

AA (2) batteries (NiMH recommended)

Weight

122 g

142 g

Dimensions

98 x 51 x 38 mm

94 x 63 x 31 mm

Year

2004

2005

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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

Samsung 401 diagonal

The diagonal of 401 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

Panasonic LS1 diagonal

The diagonal of LS1 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

Surface area

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

401 sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 mm²

LS1 sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 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

401 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 2306 pixels

Pixel pitch =	5.75	× 1000	= 2.49 µm
	2306

LS1 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 2306 pixels

Pixel pitch =	5.75	× 1000	= 2.49 µm
	2306

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

401 pixel area

Pixel pitch = 2.49 µm

Pixel area = 2.49² = 6.2 µm²

LS1 pixel area

Pixel pitch = 2.49 µm

Pixel area = 2.49² = 6.2 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

401 pixel density

Sensor resolution width = 2306 pixels
Sensor width = 0.575 cm

Pixel density = (2306 / 0.575)² / 1000000 = 16.08 MP/cm²

LS1 pixel density

Sensor resolution width = 2306 pixels
Sensor width = 0.575 cm

Pixel density = (2306 / 0.575)² / 1000000 = 16.08 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

401 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 4.00

r = 5.75/4.32 = 1.33

X = √	4.00 × 1000000	= 1734
	1.33

Resolution horizontal: X × r = 1734 × 1.33 = 2306
Resolution vertical: X = 1734

Sensor resolution = 2306 x 1734

LS1 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 4.00

r = 5.75/4.32 = 1.33

X = √	4.00 × 1000000	= 1734
	1.33

Resolution horizontal: X × r = 1734 × 1.33 = 2306
Resolution vertical: X = 1734

Sensor resolution = 2306 x 1734

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

401 crop factor

Sensor diagonal in mm = 7.19 mm

Crop factor =	43.27	= 6.02
	7.19

LS1 crop factor

Sensor diagonal in mm = 7.19 mm

Crop factor =	43.27	= 6.02
	7.19

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).

401 equivalent aperture

Crop factor = 6.02
Aperture = f2.9

35-mm equivalent aperture = (f2.9) × 6.02 = f17.5

LS1 equivalent aperture

Crop factor = 6.02
Aperture = f2.8 - f5

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

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