Fujifilm X20 vs. Fujifilm X100S

Comparison

X20 image
vs.
X100S image

 

Fujifilm X20 Fujifilm X100S
Megapixels
12.00 16.30
Max. resolution
4000 x 3000 4896 x 3264
Price
Amazon, B&H Photo, Adorama Amazon, B&H Photo, Adorama

Sensor

Sensor type
CMOS CMOS
Sensor size
2/3" (~ 8.8 x 6.6 mm) 23.6 x 15.8 mm
Sensor resolution
3995 x 3004  4929 x 3308 
Diagonal
11.00 mm  28.40 mm 
Surface area
58.08 mm²  372.88 mm² 
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 sizes:
Fujifilm X20
vs.
Fujifilm X100S
 
Surface area:
Fujifilm X20
Fujifilm X100S
Difference: 314.8 mm² (542%)
Fujifilm X100S has approx. 542% more surface area than Fujifilm X20.
Pixel pitch
2.2 µm  4.79 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.
Pixel pitch
Fujifilm X20
Fujifilm X100S
Difference: 2.59 µm (118%)
Pixel pitch of Fujifilm X100S is approx. 118% higher than pixel pitch of Fujifilm X20.
Pixel area
4.84 µm²  22.94 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:
Fujifilm X20
vs.
Fujifilm X100S
Pixel area difference: 18.1 µm² (374%)
A pixel on Fujifilm X100S sensor is approx. 374% bigger than a pixel on Fujifilm X20.
Pixel density
20.61 MP/cm²  4.36 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.
Pixel density
Fujifilm X20
Fujifilm X100S
Difference: 16.25 MP/cm² (373%)
Fujifilm X20 has approx. 373% higher pixel density than Fujifilm X100S.
To learn about the accuracy of these numbers, click here.

Other specifications

Crop factor
3.93  1.52 
Total megapixels
n/a n/a
Effective megapixels
12.00 16.30
Optical zoom
4x 1x
Digital zoom
Yes n/a
Iso
Auto, 100, 200, 250, 320, 400, 500, 640, 800, 1000, 1250, 1600, 2000, 2500, 3200, 4000, 5000, 6400, 12800 Auto (ISO 200 - 6400), ISO 100, 12800 and 25600 with boost
Auto focus
Yes Yes
Manual focus
Yes Yes
Normal focus range
50 cm 50 cm
Macro focus range
1 cm 10 cm
Focal length (35mm equiv.)
28 - 112 mm 35 mm
Aperture priority
Yes Yes
Aperture
f2.0 - f2.8 f2
Aperture (35mm equiv.)
f7.9 - f11  f3 
Metering
Multi, Average, Spot Multi, Average, Spot
Exposure compensation
±2 EV (at 1/3 EV steps) ±2 EV (at 1/3 EV steps)
Shutter priority
Yes Yes
Min. shutter speed
30 sec 30 sec
Max. shutter speed
1/4000 sec 1/4000 sec
Flash modes
Auto, On, Off, Red-Eye, Slow Sync Auto, Forced Flash, Suppressed Flash, Slow Synchro
Built-in flash
Yes Yes
External flash
Yes Yes
Viewfinder
Optical (tunnel) Electronic and Optical (tunnel)
White balance presets
7 7
LCD display
Yes Yes
LCD size
2.8" 2.8"
LCD resolution
460,000 460,000
Min. image resolution
1536 x 1536 1664 x 1664
Selftimer
Yes Yes
Storage types
SD/SDHC/SDXC SD/SDHC/SDXC
USB
USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
Batteries
Lithium-Ion NP-50 rechargeable battery & charger Lithium-Ion NP-95 rechargeable battery & charger
Weight
353 g 445 g
Dimensions
117 x 69.6 x 56.8 mm 126.5 x 74.4 x 53.9 mm
Year
2013 2013



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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 X20 diagonal

The diagonal of Fujifilm X20 image sensor is not 2/3 inch as you might expect, but approximately two thirds of that value. If you want to know why, see sensor sizes.

w = 8.80 mm
h = 6.60 mm
Diagonal =  8.80² + 6.60²   = 11.00 mm

Fujifilm X100S diagonal

w = 23.60 mm
h = 15.80 mm
Diagonal =  23.60² + 15.80²   = 28.40 mm


Surface area

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

Fujifilm X20 surface area

Width = 8.80 mm
Height = 6.60 mm

Surface area = 8.80 × 6.60 = 58.08 mm²

Fujifilm X100S surface area

Width = 23.60 mm
Height = 15.80 mm

Surface area = 23.60 × 15.80 = 372.88 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

Fujifilm X20 pixel pitch

Sensor width = 8.80 mm
Sensor resolution width = 3995 pixels
Pixel pitch =   8.80  × 1000  = 2.2 µm
3995

Fujifilm X100S pixel pitch

Sensor width = 23.60 mm
Sensor resolution width = 4929 pixels
Pixel pitch =   23.60  × 1000  = 4.79 µm
4929


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

Fujifilm X20 pixel area

Pixel pitch = 2.2 µm

Pixel area = 2.2² = 4.84 µm²

Fujifilm X100S pixel area

Pixel pitch = 4.79 µm

Pixel area = 4.79² = 22.94 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

You could also use this formula:
Pixel density =   effective megapixels × 1000000  / 10000
sensor surface area in mm²

Fujifilm X20 pixel density

Sensor resolution width = 3995 pixels
Sensor width = 0.88 cm

Pixel density = (3995 / 0.88)² / 1000000 = 20.61 MP/cm²

Fujifilm X100S pixel density

Sensor resolution width = 4929 pixels
Sensor width = 2.36 cm

Pixel density = (4929 / 2.36)² / 1000000 = 4.36 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. 22.8 × 15.5 sensor for example has a ratio of 1.47.

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

Fujifilm X20 sensor resolution

Sensor width = 8.80 mm
Sensor height = 6.60 mm
Effective megapixels = 12.00
r = 8.80/6.60 = 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

Fujifilm X100S sensor resolution

Sensor width = 23.60 mm
Sensor height = 15.80 mm
Effective megapixels = 16.30
r = 23.60/15.80 = 1.49
X =  16.30 × 1000000  = 3308
1.49
Resolution horizontal: X × r = 3308 × 1.49 = 4929
Resolution vertical: X = 3308

Sensor resolution = 4929 x 3308


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


Fujifilm X20 crop factor

Sensor diagonal in mm = 11.00 mm
Crop factor =   43.27  = 3.93
11.00

Fujifilm X100S crop factor

Sensor diagonal in mm = 28.40 mm
Crop factor =   43.27  = 1.52
28.40

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).

Fujifilm X20 equivalent aperture

Crop factor = 3.93
Aperture = f2.0 - f2.8

35-mm equivalent aperture = (f2.0 - f2.8) × 3.93 = f7.9 - f11

Fujifilm X100S equivalent aperture

Crop factor = 1.52
Aperture = f2

35-mm equivalent aperture = (f2) × 1.52 = f3


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