Pentax Optio S12 vs. Fujifilm FinePix S8000fd

Comparison

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Optio S12 image
vs
FinePix S8000fd image
Pentax Optio S12 Fujifilm FinePix S8000fd
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Megapixels
12.00
8.00
Max. image resolution
4000 x 3000
3264 x 2448

Sensor

Sensor type
CCD
CCD
Sensor size
1/1.7" (~ 7.53 x 5.64 mm)
1/2.35" (~ 6.03 x 4.52 mm)
Sensor resolution
4011 x 2993
3262 x 2453
Diagonal
9.41 mm
7.54 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
1.56 : 1
(ratio)
Pentax Optio S12 Fujifilm FinePix S8000fd
Surface area:
42.47 mm² vs 27.26 mm²
Difference: 15.21 mm² (56%)
S12 sensor is approx. 1.56x bigger than S8000fd sensor.
Pixel pitch
1.88 µm
1.85 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: 0.03 µm (2%)
Pixel pitch of S12 is approx. 2% higher than pixel pitch of S8000fd.
Pixel area
3.53 µm²
3.42 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: 0.11 µm² (3%)
A pixel on Pentax S12 sensor is approx. 3% bigger than a pixel on Fujifilm S8000fd.
Pixel density
28.37 MP/cm²
29.26 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: 0.89 µm (3%)
Fujifilm S8000fd has approx. 3% higher pixel density than Pentax S12.
To learn about the accuracy of these numbers, click here.



Specs

Pentax S12
Fujifilm S8000fd
Crop factor
4.6
5.74
Total megapixels
12.40
8.30
Effective megapixels
12.00
8.00
Optical zoom
3x
18x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 50, 100, 200, 400, 800, 1600, 3200
Auto, 64, 100, 200, 400, 800, 1600, 3200, 6400
RAW
Manual focus
Normal focus range
35 cm
70 cm
Macro focus range
12 cm
10 cm
Focal length (35mm equiv.)
38 - 114 mm
27 - 486 mm
Aperture priority
No
Yes
Max. aperture
f2.8 - f5.4
f2.8 - f4.5
Max. aperture (35mm equiv.)
f12.9 - f24.8
f16.1 - f25.8
Metering
Centre weighted, Multi-pattern, Spot
TTL 256-zones metering
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
Yes
Min. shutter speed
4 sec
4 sec
Max. shutter speed
1/2000 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
None
Electronic
White balance presets
5
6
Screen size
2.5"
2.5"
Screen resolution
232,000 dots
230,000 dots
Video capture
Max. video resolution
Storage types
SDHC, Secure Digital
xD Picture card
USB
USB 1.0
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion (D-LI78)
Lithium-Ion (NP-40)
Weight
130 g
510 g
Dimensions
87 x 54 x 21 mm
111 x 78 x 79 mm
Year
2008
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

Pentax S12 diagonal

The diagonal of S12 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

Fujifilm S8000fd diagonal

The diagonal of S8000fd sensor is not 1/2.35 or 0.43" (10.8 mm) as you might expect, but approximately two thirds of that value - 7.54 mm. If you want to know why, see sensor sizes.

w = 6.03 mm
h = 4.52 mm
Diagonal =  6.03² + 4.52²   = 7.54 mm


Surface area

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

S12 sensor area

Width = 7.53 mm
Height = 5.64 mm

Surface area = 7.53 × 5.64 = 42.47 mm²

S8000fd sensor area

Width = 6.03 mm
Height = 4.52 mm

Surface area = 6.03 × 4.52 = 27.26 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

S12 pixel pitch

Sensor width = 7.53 mm
Sensor resolution width = 4011 pixels
Pixel pitch =   7.53  × 1000  = 1.88 µm
4011

S8000fd pixel pitch

Sensor width = 6.03 mm
Sensor resolution width = 3262 pixels
Pixel pitch =   6.03  × 1000  = 1.85 µm
3262


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

S12 pixel area

Pixel pitch = 1.88 µm

Pixel area = 1.88² = 3.53 µm²

S8000fd pixel area

Pixel pitch = 1.85 µm

Pixel area = 1.85² = 3.42 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

S12 pixel density

Sensor resolution width = 4011 pixels
Sensor width = 0.753 cm

Pixel density = (4011 / 0.753)² / 1000000 = 28.37 MP/cm²

S8000fd pixel density

Sensor resolution width = 3262 pixels
Sensor width = 0.603 cm

Pixel density = (3262 / 0.603)² / 1000000 = 29.26 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

S12 sensor resolution

Sensor width = 7.53 mm
Sensor height = 5.64 mm
Effective megapixels = 12.00
r = 7.53/5.64 = 1.34
X =  12.00 × 1000000  = 2993
1.34
Resolution horizontal: X × r = 2993 × 1.34 = 4011
Resolution vertical: X = 2993

Sensor resolution = 4011 x 2993

S8000fd sensor resolution

Sensor width = 6.03 mm
Sensor height = 4.52 mm
Effective megapixels = 8.00
r = 6.03/4.52 = 1.33
X =  8.00 × 1000000  = 2453
1.33
Resolution horizontal: X × r = 2453 × 1.33 = 3262
Resolution vertical: X = 2453

Sensor resolution = 3262 x 2453


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


S12 crop factor

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

S8000fd crop factor

Sensor diagonal in mm = 7.54 mm
Crop factor =   43.27  = 5.74
7.54

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).

S12 equivalent aperture

Crop factor = 4.6
Aperture = f2.8 - f5.4

35-mm equivalent aperture = (f2.8 - f5.4) × 4.6 = f12.9 - f24.8

S8000fd equivalent aperture

Crop factor = 5.74
Aperture = f2.8 - f4.5

35-mm equivalent aperture = (f2.8 - f4.5) × 5.74 = f16.1 - f25.8

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