Sigma DP1s vs. Fujifilm X30

Comparison

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DP1s image
vs
X30 image
Sigma DP1s Fujifilm X30
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Megapixels
4.70
12.00
Max. image resolution
2640 x 1760 x 3
4000 x 3000
Note: Sigma DP1s uses Foveon X3 image sensor, which is a new type of sensor that has 3 layers of photoelements stacked together in 1 pixel location. Traditional CCD/CMOS sensors have 1 pixel for 1 color, whereas Foveon sensor captures all 3 colors (blue, green, and red) at every pixel.

Sensor

Sensor type
Foveon
CMOS
Sensor size
20.7 x 13.8 mm
2/3" (~ 8.8 x 6.6 mm)
Sensor resolution
2655 x 1770
3995 x 3004
Diagonal
24.88 mm
11.00 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
4.92 : 1
(ratio)
Sigma DP1s Fujifilm X30
Surface area:
285.66 mm² vs 58.08 mm²
Difference: 227.58 mm² (392%)
DP1s sensor is approx. 4.92x bigger than X30 sensor.
Note: You are comparing cameras of different generations. There is a 5 year gap between Sigma DP1s (2009) and Fujifilm X30 (2014). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
7.8 µm
2.2 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: 5.6 µm (255%)
Pixel pitch of DP1s is approx. 255% higher than pixel pitch of X30.
Pixel area
60.84 µm²
4.84 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: 56 µm² (1157%)
A pixel on Sigma DP1s sensor is approx. 1157% bigger than a pixel on Fujifilm X30.
Pixel density
1.65 MP/cm²
20.61 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: 18.96 µm (1149%)
Fujifilm X30 has approx. 1149% higher pixel density than Sigma DP1s.
To learn about the accuracy of these numbers, click here.



Specs

Sigma DP1s
Fujifilm X30
Crop factor
1.74
3.93
Total megapixels
4.70
Effective megapixels
4.70
12.00
Optical zoom
1x
4x
Digital zoom
No
Yes
ISO sensitivity
Auto, 100, 200, 400, 800
Auto, 100-12800
RAW
Manual focus
Normal focus range
50 cm
Macro focus range
1 cm
Focal length (35mm equiv.)
28 mm
28 - 112 mm
Aperture priority
Yes
Yes
Max. aperture
f2.0 - f2.8
Max. aperture (35mm equiv.)
n/a
f7.9 - f11
Metering
Centre weighted, Matrix, Multi-segment
Multi, Spot, Average
Exposure compensation
±3 EV (in 1/3 EV steps)
±3 EV (in 1/3 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
30 sec
30 sec
Max. shutter speed
1/4000 sec
1/4000 sec
Built-in flash
External flash
Viewfinder
None
Electronic
White balance presets
6
7
Screen size
2.5"
3"
Screen resolution
230,000 dots
920,000 dots
Video capture
Max. video resolution
1920x1080 (60p/50p/30p/25p/24p)
Storage types
SDHC, Secure Digital
SD/SDHC/SDXC
USB
USB 1.0
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion rechargeable battery
NP-95 Li-ion battery
Weight
270 g
423 g
Dimensions
113 x 60 x 50 mm
118.7 x 71.6 x 60.3 mm
Year
2009
2014




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vs

Diagonal

Diagonal is calculated by the use of Pythagorean theorem:
Diagonal =  w² + h²
where w = sensor width and h = sensor height

Sigma DP1s diagonal

w = 20.70 mm
h = 13.80 mm
Diagonal =  20.70² + 13.80²   = 24.88 mm

Fujifilm X30 diagonal

The diagonal of X30 sensor is not 2/3 or 0.67" (16.9 mm) as you might expect, but approximately two thirds of that value - 11 mm. 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


Surface area

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

DP1s sensor area

Width = 20.70 mm
Height = 13.80 mm

Surface area = 20.70 × 13.80 = 285.66 mm²

X30 sensor area

Width = 8.80 mm
Height = 6.60 mm

Surface area = 8.80 × 6.60 = 58.08 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

DP1s pixel pitch

Sensor width = 20.70 mm
Sensor resolution width = 2655 pixels
Pixel pitch =   20.70  × 1000  = 7.8 µm
2655

X30 pixel pitch

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


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

DP1s pixel area

Pixel pitch = 7.8 µm

Pixel area = 7.8² = 60.84 µm²

X30 pixel area

Pixel pitch = 2.2 µm

Pixel area = 2.2² = 4.84 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

DP1s pixel density

Sensor resolution width = 2655 pixels
Sensor width = 2.07 cm

Pixel density = (2655 / 2.07)² / 1000000 = 1.65 MP/cm²

X30 pixel density

Sensor resolution width = 3995 pixels
Sensor width = 0.88 cm

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

DP1s sensor resolution

Sensor width = 20.70 mm
Sensor height = 13.80 mm
Effective megapixels = 4.70
r = 20.70/13.80 = 1.5
X =  4.70 × 1000000  = 1770
1.5
Resolution horizontal: X × r = 1770 × 1.5 = 2655
Resolution vertical: X = 1770

Sensor resolution = 2655 x 1770

X30 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


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


DP1s crop factor

Sensor diagonal in mm = 24.88 mm
Crop factor =   43.27  = 1.74
24.88

X30 crop factor

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

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).

DP1s 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 Sigma DP1s, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Sigma DP1s is 1.74

X30 equivalent aperture

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

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

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