Sigma DP1 vs. Leica Digilux 2
Comparison
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| Sigma DP1 | Leica Digilux 2 | ||||
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Megapixels
4.70
4.90
Max. image resolution
2640 x 1760 x 3
2560 x 1920
Note: Sigma DP1 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
CCD
Sensor size
20.7 x 13.8 mm
2/3" (~ 8.8 x 6.6 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 »
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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| 4.92 | : | 1 |
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| Sigma DP1 | Leica Digilux 2 | |
Surface area:
| 285.66 mm² | vs | 58.08 mm² |
Difference: 227.58 mm² (392%)
DP1 sensor is approx. 4.92x bigger than Digilux 2 sensor.
Note: You are comparing cameras of different generations.
There is a 3 year gap between Sigma DP1 (2006) and Leica Digilux 2 (2003).
All things being equal, newer sensor generations generally outperform the older.
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.
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 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.
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: 48.94 µm² (411%)
A pixel on Sigma DP1 sensor is approx. 411% bigger than a pixel on Leica Digilux 2.
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.
Higher pixel density means smaller pixels and lower pixel density means larger pixels.
To learn about the accuracy of these numbers,
click here.
Specs
Sigma DP1
Leica Digilux 2
Total megapixels
4.70
5.20
Effective megapixels
4.70
4.90
Optical zoom
1x
3.2x
Digital zoom
No
Yes
ISO sensitivity
Auto, 100, 200, 400, 800
100, 200, 400
RAW
Manual focus
Normal focus range
30 cm
Macro focus range
30 cm
Focal length (35mm equiv.)
28 mm
28 - 90 mm
Aperture priority
Yes
Yes
Max. aperture
f2.0 - f2.4
Metering
Centre weighted, Matrix, Multi-segment
Centre weighted, Multi-segment, Spot
Exposure compensation
±3 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
30 sec
8 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"
2.5"
Screen resolution
230,000 dots
211,000 dots
Video capture
Max. video resolution
Storage types
SDHC, Secure Digital
MultiMedia, Secure Digital
USB
USB 1.0
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion rechargeable battery
Lithium-Ion 1400 mAh supplied
Weight
270 g
630 g
Dimensions
113 x 60 x 50 mm
135 x 82 x 103 mm
Year
2006
2003
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Diagonal
Diagonal is calculated by the use of Pythagorean theorem:
where w = sensor width and h = sensor height
| Diagonal = √ | w² + h² |
Sigma DP1 diagonal
w = 20.70 mm
h = 13.80 mm
h = 13.80 mm
| Diagonal = √ | 20.70² + 13.80² | = 24.88 mm |
Leica Digilux 2 diagonal
The diagonal of Digilux 2 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
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.
DP1 sensor area
Width = 20.70 mm
Height = 13.80 mm
Surface area = 20.70 × 13.80 = 285.66 mm²
Height = 13.80 mm
Surface area = 20.70 × 13.80 = 285.66 mm²
Digilux 2 sensor area
Width = 8.80 mm
Height = 6.60 mm
Surface area = 8.80 × 6.60 = 58.08 mm²
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 |
DP1 pixel pitch
Sensor width = 20.70 mm
Sensor resolution width = 2655 pixels
Sensor resolution width = 2655 pixels
| Pixel pitch = | 20.70 | × 1000 | = 7.8 µm |
| 2655 |
Digilux 2 pixel pitch
Sensor width = 8.80 mm
Sensor resolution width = 2552 pixels
Sensor resolution width = 2552 pixels
| Pixel pitch = | 8.80 | × 1000 | = 3.45 µm |
| 2552 |
Pixel area
The area of one pixel can be calculated by simply squaring the pixel pitch:
You could also divide sensor surface area with effective megapixels:
Pixel area = pixel pitch²
You could also divide sensor surface area with effective megapixels:
| Pixel area = | sensor surface area in mm² |
| effective megapixels |
DP1 pixel area
Pixel pitch = 7.8 µm
Pixel area = 7.8² = 60.84 µm²
Pixel area = 7.8² = 60.84 µm²
Digilux 2 pixel area
Pixel pitch = 3.45 µm
Pixel area = 3.45² = 11.9 µm²
Pixel area = 3.45² = 11.9 µm²
Pixel density
Pixel density can be calculated with the following formula:
One could also use this 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 |
DP1 pixel density
Sensor resolution width = 2655 pixels
Sensor width = 2.07 cm
Pixel density = (2655 / 2.07)² / 1000000 = 1.65 MP/cm²
Sensor width = 2.07 cm
Pixel density = (2655 / 2.07)² / 1000000 = 1.65 MP/cm²
Digilux 2 pixel density
Sensor resolution width = 2552 pixels
Sensor width = 0.88 cm
Pixel density = (2552 / 0.88)² / 1000000 = 8.41 MP/cm²
Sensor width = 0.88 cm
Pixel density = (2552 / 0.88)² / 1000000 = 8.41 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:
3. To get sensor resolution we then multiply X with the corresponding ratio:
Resolution horizontal: X × r
Resolution vertical: X
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 → |
|
Resolution horizontal: X × r
Resolution vertical: X
DP1 sensor resolution
Sensor width = 20.70 mm
Sensor height = 13.80 mm
Effective megapixels = 4.70
Resolution horizontal: X × r = 1770 × 1.5 = 2655
Resolution vertical: X = 1770
Sensor resolution = 2655 x 1770
Sensor height = 13.80 mm
Effective megapixels = 4.70
| r = 20.70/13.80 = 1.5 |
|
Resolution vertical: X = 1770
Sensor resolution = 2655 x 1770
Digilux 2 sensor resolution
Sensor width = 8.80 mm
Sensor height = 6.60 mm
Effective megapixels = 4.90
Resolution horizontal: X × r = 1919 × 1.33 = 2552
Resolution vertical: X = 1919
Sensor resolution = 2552 x 1919
Sensor height = 6.60 mm
Effective megapixels = 4.90
| r = 8.80/6.60 = 1.33 |
|
Resolution vertical: X = 1919
Sensor resolution = 2552 x 1919
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 |
DP1 crop factor
Sensor diagonal in mm = 24.88 mm
| Crop factor = | 43.27 | = 1.74 |
| 24.88 |
Digilux 2 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).
DP1 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 DP1, take the aperture of the lens
you're using and multiply it with crop factor.
Crop factor for Sigma DP1 is 1.74
Crop factor for Sigma DP1 is 1.74
Digilux 2 equivalent aperture
Crop factor = 3.93
Aperture = f2.0 - f2.4
35-mm equivalent aperture = (f2.0 - f2.4) × 3.93 = f7.9 - f9.4
Aperture = f2.0 - f2.4
35-mm equivalent aperture = (f2.0 - f2.4) × 3.93 = f7.9 - f9.4
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