Fujifilm FinePix A120 vs. Fujifilm FinePix JX580

Comparison

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Fujifilm FinePix A120

Fujifilm FinePix JX580

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Megapixels

3.10

16.00

Max. image resolution

2016 x 1512

4608 x 3440

Sensor

Sensor type

CCD

n/a

Sensor size

1/2.7" (~ 5.33 x 4 mm)

1/2.3" (~ 6.16 x 4.62 mm)

Sensor resolution

2031 x 1527

4612 x 3468

Diagonal

6.66 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	:	1.33
(ratio)

Fujifilm FinePix A120		Fujifilm FinePix JX580

Surface area:

21.32 mm²

28.46 mm²

Difference: 7.14 mm² (33%)

JX580 sensor is approx. 1.33x bigger than A120 sensor.

Note: You are comparing sensors of very different generations. There is a gap of 8 years between Fujifilm A120 (2004) and Fujifilm JX580 (2012). Eight years is a lot of time in terms of technology, meaning newer sensors are overall much more efficient than the older ones.

Pixel pitch

2.62 µm

1.34 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: 1.28 µm (96%)

Pixel pitch of A120 is approx. 96% higher than pixel pitch of JX580.

Pixel area

6.86 µm²

1.8 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: 5.06 µm² (281%)

A pixel on Fujifilm A120 sensor is approx. 281% bigger than a pixel on Fujifilm JX580.

Pixel density

14.52 MP/cm²

56.06 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: 41.54 µm (286%)

Fujifilm JX580 has approx. 286% higher pixel density than Fujifilm A120.

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

Specs

Fujifilm A120

Fujifilm JX580

Crop factor

6.5

5.62

Total megapixels

3.30

Effective megapixels

3.10

Optical zoom

Digital zoom

Yes

ISO sensitivity

Auto, 125, 200, 500

RAW

Manual focus

Normal focus range

80 cm

Macro focus range

9 cm

Focal length (35mm equiv.)

38 mm

Aperture priority

Max. aperture

f5.6

Max. aperture (35mm equiv.)

f36.4

n/a

Metering

64-segment

Exposure compensation

±2 EV (in 1/2 EV steps)

Shutter priority

Min. shutter speed

1/2 sec

Max. shutter speed

1/2000 sec

Built-in flash

External flash

Viewfinder

Optical (tunnel)

Electronic

White balance presets

Screen size

1.5"

Screen resolution

62,000 dots

Video capture

Max. video resolution

Storage types

xD Picture card

USB

USB 1.0

HDMI

Wireless

GPS

Battery

AA (2) batteries (NiMH recommended)

Weight

120 g

Dimensions

101.5 x 50.8 x 41.5 mm

Year

2004

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

Fujifilm A120 diagonal

The diagonal of A120 sensor is not 1/2.7 or 0.37" (9.4 mm) as you might expect, but approximately two thirds of that value - 6.66 mm. If you want to know why, see sensor sizes.

w = 5.33 mm
h = 4.00 mm

Diagonal = √

5.33² + 4.00²

= 6.66 mm

Fujifilm JX580 diagonal

The diagonal of JX580 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.

A120 sensor area

Width = 5.33 mm
Height = 4.00 mm

Surface area = 5.33 × 4.00 = 21.32 mm²

JX580 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

A120 pixel pitch

Sensor width = 5.33 mm
Sensor resolution width = 2031 pixels

Pixel pitch =	5.33	× 1000	= 2.62 µm
	2031

JX580 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4612 pixels

Pixel pitch =	6.16	× 1000	= 1.34 µm
	4612

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

A120 pixel area

Pixel pitch = 2.62 µm

Pixel area = 2.62² = 6.86 µm²

JX580 pixel area

Pixel pitch = 1.34 µm

Pixel area = 1.34² = 1.8 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

A120 pixel density

Sensor resolution width = 2031 pixels
Sensor width = 0.533 cm

Pixel density = (2031 / 0.533)² / 1000000 = 14.52 MP/cm²

JX580 pixel density

Sensor resolution width = 4612 pixels
Sensor width = 0.616 cm

Pixel density = (4612 / 0.616)² / 1000000 = 56.06 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

A120 sensor resolution

Sensor width = 5.33 mm
Sensor height = 4.00 mm
Effective megapixels = 3.10

r = 5.33/4.00 = 1.33

X = √	3.10 × 1000000	= 1527
	1.33

Resolution horizontal: X × r = 1527 × 1.33 = 2031
Resolution vertical: X = 1527

Sensor resolution = 2031 x 1527

JX580 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 16.00

r = 6.16/4.62 = 1.33

X = √	16.00 × 1000000	= 3468
	1.33

Resolution horizontal: X × r = 3468 × 1.33 = 4612
Resolution vertical: X = 3468

Sensor resolution = 4612 x 3468

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

A120 crop factor

Sensor diagonal in mm = 6.66 mm

Crop factor =	43.27	= 6.5
	6.66

JX580 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).

A120 equivalent aperture

Crop factor = 6.5
Aperture = f5.6

35-mm equivalent aperture = (f5.6) × 6.5 = f36.4

JX580 equivalent aperture

Aperture is a lens characteristic, so it's calculated only for fixed lens cameras. If you want to know the equivalent aperture for Fujifilm JX580, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Fujifilm JX580 is 5.62

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