Samsung Digimax V70 vs. Fujifilm FinePix A800

Comparison

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Samsung Digimax V70

Fujifilm FinePix A800

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Megapixels

7.00

8.10

Max. image resolution

3072 x 2304

3296 x 2472

Sensor

Sensor type

CCD

Sensor size

1/1.8" (~ 7.11 x 5.33 mm)

1/1.6" (~ 8 x 6 mm)

Sensor resolution

3051 x 2294

3282 x 2468

Diagonal

8.89 mm

10.00 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	:	1.27
(ratio)

Samsung Digimax V70		Fujifilm FinePix A800

Surface area:

37.90 mm²

48.00 mm²

Difference: 10.1 mm² (27%)

A800 sensor is approx. 1.27x bigger than V70 sensor.

Note: You are comparing cameras of different generations. There is a 3 year gap between Samsung V70 (2004) and Fujifilm A800 (2007). All things being equal, newer sensor generations generally outperform the older.

Pixel pitch

2.33 µm

2.44 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: 0.11 µm (5%)

Pixel pitch of A800 is approx. 5% higher than pixel pitch of V70.

Pixel area

5.43 µm²

5.95 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: 0.52 µm² (10%)

A pixel on Fujifilm A800 sensor is approx. 10% bigger than a pixel on Samsung V70.

Pixel density

18.41 MP/cm²

16.83 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: 1.58 µm (9%)

Samsung V70 has approx. 9% higher pixel density than Fujifilm A800.

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

Specs

Samsung V70

Fujifilm A800

Crop factor

4.87

4.33

Total megapixels

8.30

Effective megapixels

8.10

Optical zoom

Yes

Digital zoom

Yes

ISO sensitivity

Auto, 50, 100, 200, 400

Auto, 100, 200, 400, 800

RAW

Manual focus

Normal focus range

80 cm

50 cm

Macro focus range

4 cm

10 cm

Focal length (35mm equiv.)

38 - 114 mm

36 - 108 mm

Aperture priority

Yes

Max. aperture

f2.7 - f4.9

f2.8 - f5.2

Max. aperture (35mm equiv.)

f13.1 - f23.9

f12.1 - f22.5

Metering

Multi Spot, Spot

256-segment Matrix

Exposure compensation

±2 EV (in 1/2 EV steps)

±2 EV (in 1/3 EV steps)

Shutter priority

Yes

Min. shutter speed

15 sec

4 sec

Max. shutter speed

1/2000 sec

1/1600 sec

Built-in flash

External flash

Viewfinder

Optical

None

White balance presets

Screen size

2.5"

Screen resolution

117,000 dots

115,000 dots

Video capture

Max. video resolution

Storage types

MultiMedia, Secure Digital

xD Picture card

USB

USB 2.0 (480 Mbit/sec)

HDMI

Wireless

GPS

Battery

2x AA, Li-Ion

AA (2) batteries (NiMH recommended)

Weight

190 g

151 g

Dimensions

106.5 x 57 x 38.5 mm

97.5 x 61.9 x 31.0 mm

Year

2004

2007

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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 V70 diagonal

The diagonal of V70 sensor is not 1/1.8 or 0.56" (14.1 mm) as you might expect, but approximately two thirds of that value - 8.89 mm. If you want to know why, see sensor sizes.

w = 7.11 mm
h = 5.33 mm

Diagonal = √

7.11² + 5.33²

= 8.89 mm

Fujifilm A800 diagonal

The diagonal of A800 sensor is not 1/1.6 or 0.63" (15.9 mm) as you might expect, but approximately two thirds of that value - 10 mm. If you want to know why, see sensor sizes.

w = 8.00 mm
h = 6.00 mm

Diagonal = √

8.00² + 6.00²

= 10.00 mm

Surface area

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

V70 sensor area

Width = 7.11 mm
Height = 5.33 mm

Surface area = 7.11 × 5.33 = 37.90 mm²

A800 sensor area

Width = 8.00 mm
Height = 6.00 mm

Surface area = 8.00 × 6.00 = 48.00 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

V70 pixel pitch

Sensor width = 7.11 mm
Sensor resolution width = 3051 pixels

Pixel pitch =	7.11	× 1000	= 2.33 µm
	3051

A800 pixel pitch

Sensor width = 8.00 mm
Sensor resolution width = 3282 pixels

Pixel pitch =	8.00	× 1000	= 2.44 µm
	3282

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

V70 pixel area

Pixel pitch = 2.33 µm

Pixel area = 2.33² = 5.43 µm²

A800 pixel area

Pixel pitch = 2.44 µm

Pixel area = 2.44² = 5.95 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

V70 pixel density

Sensor resolution width = 3051 pixels
Sensor width = 0.711 cm

Pixel density = (3051 / 0.711)² / 1000000 = 18.41 MP/cm²

A800 pixel density

Sensor resolution width = 3282 pixels
Sensor width = 0.8 cm

Pixel density = (3282 / 0.8)² / 1000000 = 16.83 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

V70 sensor resolution

Sensor width = 7.11 mm
Sensor height = 5.33 mm
Effective megapixels = 7.00

r = 7.11/5.33 = 1.33

X = √	7.00 × 1000000	= 2294
	1.33

Resolution horizontal: X × r = 2294 × 1.33 = 3051
Resolution vertical: X = 2294

Sensor resolution = 3051 x 2294

A800 sensor resolution

Sensor width = 8.00 mm
Sensor height = 6.00 mm
Effective megapixels = 8.10

r = 8.00/6.00 = 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

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

V70 crop factor

Sensor diagonal in mm = 8.89 mm

Crop factor =	43.27	= 4.87
	8.89

A800 crop factor

Sensor diagonal in mm = 10.00 mm

Crop factor =	43.27	= 4.33
	10.00

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).

V70 equivalent aperture

Crop factor = 4.87
Aperture = f2.7 - f4.9

35-mm equivalent aperture = (f2.7 - f4.9) × 4.87 = f13.1 - f23.9

A800 equivalent aperture

Crop factor = 4.33
Aperture = f2.8 - f5.2

35-mm equivalent aperture = (f2.8 - f5.2) × 4.33 = f12.1 - f22.5

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