Fujifilm FinePix JX520 vs. Canon PowerShot A490

Comparison

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FinePix JX520 image
vs
PowerShot A490 image
Fujifilm FinePix JX520 Canon PowerShot A490
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Megapixels
14.00
10.00
Max. image resolution
4288 x 3216
3648 x 2736

Sensor

Sensor type
n/a
CCD
Sensor size
1/2.3" (~ 6.16 x 4.62 mm)
1/2.3" (~ 6.16 x 4.62 mm)
Sensor resolution
4315 x 3244
3647 x 2742
Diagonal
7.70 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 »
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1 : 1
(ratio)
Fujifilm FinePix JX520 Canon PowerShot A490
Surface area:
28.46 mm² vs 28.46 mm²
Difference: 0 mm² (0%)
JX520 and A490 sensors are the same size.
Note: You are comparing cameras of different generations. There is a 2 year gap between Fujifilm JX520 (2012) and Canon A490 (2010). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
1.43 µm
1.69 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: 0.26 µm (18%)
Pixel pitch of A490 is approx. 18% higher than pixel pitch of JX520.
Pixel area
2.04 µm²
2.86 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: 0.82 µm² (40%)
A pixel on Canon A490 sensor is approx. 40% bigger than a pixel on Fujifilm JX520.
Pixel density
49.07 MP/cm²
35.05 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: 14.02 µm (40%)
Fujifilm JX520 has approx. 40% higher pixel density than Canon A490.
To learn about the accuracy of these numbers, click here.



Specs

Fujifilm JX520
Canon A490
Crop factor
5.62
5.62
Total megapixels
Effective megapixels
10.00
Optical zoom
3.3x
Digital zoom
Yes
ISO sensitivity
Auto, 80, 100, 200, 400, 800, 1600
RAW
Manual focus
Normal focus range
35 cm
Macro focus range
1 cm
Focal length (35mm equiv.)
37 - 122 mm
Aperture priority
No
Max. aperture
f3.0 - f5.8
Max. aperture (35mm equiv.)
n/a
f16.9 - f32.6
Metering
Centre weighted, Evaluative, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
Shutter priority
No
Min. shutter speed
15 sec
Max. shutter speed
1/2000 sec
Built-in flash
External flash
Viewfinder
Electronic
None
White balance presets
6
Screen size
2.5"
Screen resolution
115,000 dots
Video capture
Max. video resolution
Storage types
SDHC, Secure Digital
USB
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
2 x AA batteries (Alkaline or NiMH)
Weight
135 g
Dimensions
94 x 62 x 31 mm
Year
2012
2010




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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 JX520 diagonal

The diagonal of JX520 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

Canon A490 diagonal

The diagonal of A490 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.

JX520 sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

A490 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

JX520 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4315 pixels
Pixel pitch =   6.16  × 1000  = 1.43 µm
4315

A490 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 3647 pixels
Pixel pitch =   6.16  × 1000  = 1.69 µm
3647


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

JX520 pixel area

Pixel pitch = 1.43 µm

Pixel area = 1.43² = 2.04 µm²

A490 pixel area

Pixel pitch = 1.69 µm

Pixel area = 1.69² = 2.86 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

JX520 pixel density

Sensor resolution width = 4315 pixels
Sensor width = 0.616 cm

Pixel density = (4315 / 0.616)² / 1000000 = 49.07 MP/cm²

A490 pixel density

Sensor resolution width = 3647 pixels
Sensor width = 0.616 cm

Pixel density = (3647 / 0.616)² / 1000000 = 35.05 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

JX520 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 14.00
r = 6.16/4.62 = 1.33
X =  14.00 × 1000000  = 3244
1.33
Resolution horizontal: X × r = 3244 × 1.33 = 4315
Resolution vertical: X = 3244

Sensor resolution = 4315 x 3244

A490 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 10.00
r = 6.16/4.62 = 1.33
X =  10.00 × 1000000  = 2742
1.33
Resolution horizontal: X × r = 2742 × 1.33 = 3647
Resolution vertical: X = 2742

Sensor resolution = 3647 x 2742


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


JX520 crop factor

Sensor diagonal in mm = 7.70 mm
Crop factor =   43.27  = 5.62
7.70

A490 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).

JX520 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 JX520, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Fujifilm JX520 is 5.62

A490 equivalent aperture

Crop factor = 5.62
Aperture = f3.0 - f5.8

35-mm equivalent aperture = (f3.0 - f5.8) × 5.62 = f16.9 - f32.6

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