Fujifilm FinePix F80EXR vs. Fujifilm FinePix F31fd

Comparison

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FinePix F80EXR image
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FinePix F31fd image
Fujifilm FinePix F80EXR Fujifilm FinePix F31fd
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Megapixels
12.00
6.10
Max. image resolution
4000 x 3000
2848 x 2136

Sensor

Sensor type
CCD
CCD
Sensor size
1/2" (~ 6.4 x 4.8 mm)
1/1.7" (~ 7.53 x 5.64 mm)
Sensor resolution
3995 x 3004
2860 x 2134
Diagonal
8.00 mm
9.41 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 : 1.38
(ratio)
Fujifilm FinePix F80EXR Fujifilm FinePix F31fd
Surface area:
30.72 mm² vs 42.47 mm²
Difference: 11.75 mm² (38%)
F31fd sensor is approx. 1.38x bigger than F80EXR sensor.
Note: You are comparing cameras of different generations. There is a 4 year gap between Fujifilm F80EXR (2010) and Fujifilm F31fd (2006). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
1.6 µm
2.63 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: 1.03 µm (64%)
Pixel pitch of F31fd is approx. 64% higher than pixel pitch of F80EXR.
Pixel area
2.56 µm²
6.92 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: 4.36 µm² (170%)
A pixel on Fujifilm F31fd sensor is approx. 170% bigger than a pixel on Fujifilm F80EXR.
Pixel density
38.96 MP/cm²
14.43 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: 24.53 µm (170%)
Fujifilm F80EXR has approx. 170% higher pixel density than Fujifilm F31fd.
To learn about the accuracy of these numbers, click here.



Specs

Fujifilm F80EXR
Fujifilm F31fd
Crop factor
5.41
4.6
Total megapixels
6.30
Effective megapixels
12.00
6.10
Optical zoom
10x
3x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100, 200, 400, 800, 1600, 3200, 6400, 12800
Auto, 100, 200, 400, 800, 1600, 3200
RAW
Manual focus
Normal focus range
45 cm
60 cm
Macro focus range
5 cm
5 cm
Focal length (35mm equiv.)
27 - 270 mm
36 - 108 mm
Aperture priority
No
Yes
Max. aperture
f3.3 - f5.6
f2.8 - f5
Max. aperture (35mm equiv.)
f17.9 - f30.3
f12.9 - f23
Metering
TTL 256-zones metering
256-segment Matrix, Multi Spot, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
Yes
Min. shutter speed
8 sec
15 sec
Max. shutter speed
1/2000 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
None
None
White balance presets
7
6
Screen size
3"
2.5"
Screen resolution
230,000 dots
230,000 dots
Video capture
Max. video resolution
Storage types
SDHC, Secure Digital
xD Picture card
USB
USB 2.0 (480 Mbit/sec)
USB 1.0
HDMI
Wireless
GPS
Battery
Lithium-ion NP-50 battery
Lithium-Ion (NP-95)
Weight
210 g
155 g
Dimensions
99.3 x 58.9 x 28.4 mm
92.7 x 56.7 x 27.8 mm
Year
2010
2006




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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 F80EXR diagonal

The diagonal of F80EXR sensor is not 1/2 or 0.5" (12.7 mm) as you might expect, but approximately two thirds of that value - 8 mm. If you want to know why, see sensor sizes.

w = 6.40 mm
h = 4.80 mm
Diagonal =  6.40² + 4.80²   = 8.00 mm

Fujifilm F31fd diagonal

The diagonal of F31fd sensor is not 1/1.7 or 0.59" (14.9 mm) as you might expect, but approximately two thirds of that value - 9.41 mm. If you want to know why, see sensor sizes.

w = 7.53 mm
h = 5.64 mm
Diagonal =  7.53² + 5.64²   = 9.41 mm


Surface area

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

F80EXR sensor area

Width = 6.40 mm
Height = 4.80 mm

Surface area = 6.40 × 4.80 = 30.72 mm²

F31fd sensor area

Width = 7.53 mm
Height = 5.64 mm

Surface area = 7.53 × 5.64 = 42.47 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

F80EXR pixel pitch

Sensor width = 6.40 mm
Sensor resolution width = 3995 pixels
Pixel pitch =   6.40  × 1000  = 1.6 µm
3995

F31fd pixel pitch

Sensor width = 7.53 mm
Sensor resolution width = 2860 pixels
Pixel pitch =   7.53  × 1000  = 2.63 µm
2860


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

F80EXR pixel area

Pixel pitch = 1.6 µm

Pixel area = 1.6² = 2.56 µm²

F31fd pixel area

Pixel pitch = 2.63 µm

Pixel area = 2.63² = 6.92 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

F80EXR pixel density

Sensor resolution width = 3995 pixels
Sensor width = 0.64 cm

Pixel density = (3995 / 0.64)² / 1000000 = 38.96 MP/cm²

F31fd pixel density

Sensor resolution width = 2860 pixels
Sensor width = 0.753 cm

Pixel density = (2860 / 0.753)² / 1000000 = 14.43 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

F80EXR sensor resolution

Sensor width = 6.40 mm
Sensor height = 4.80 mm
Effective megapixels = 12.00
r = 6.40/4.80 = 1.33
X =  12.00 × 1000000  = 3004
1.33
Resolution horizontal: X × r = 3004 × 1.33 = 3995
Resolution vertical: X = 3004

Sensor resolution = 3995 x 3004

F31fd sensor resolution

Sensor width = 7.53 mm
Sensor height = 5.64 mm
Effective megapixels = 6.10
r = 7.53/5.64 = 1.34
X =  6.10 × 1000000  = 2134
1.34
Resolution horizontal: X × r = 2134 × 1.34 = 2860
Resolution vertical: X = 2134

Sensor resolution = 2860 x 2134


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


F80EXR crop factor

Sensor diagonal in mm = 8.00 mm
Crop factor =   43.27  = 5.41
8.00

F31fd crop factor

Sensor diagonal in mm = 9.41 mm
Crop factor =   43.27  = 4.6
9.41

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).

F80EXR equivalent aperture

Crop factor = 5.41
Aperture = f3.3 - f5.6

35-mm equivalent aperture = (f3.3 - f5.6) × 5.41 = f17.9 - f30.3

F31fd equivalent aperture

Crop factor = 4.6
Aperture = f2.8 - f5

35-mm equivalent aperture = (f2.8 - f5) × 4.6 = f12.9 - f23

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