Leica D-LUX vs. Leica T (Typ 701)

Comparison

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D-LUX image
vs
T (Typ 701) image
Leica D-LUX Leica T (Typ 701)
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Megapixels
3.20
16.30
Max. image resolution
2048 x 1536
4944 x 3278

Sensor

Sensor type
CCD
CMOS
Sensor size
1/2.5" (~ 5.75 x 4.32 mm)
23.6 x 15.7 mm
Sensor resolution
2063 x 1551
4944 x 3296
Diagonal
7.19 mm
28.35 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 : 14.92
(ratio)
Leica D-LUX Leica T (Typ 701)
Surface area:
24.84 mm² vs 370.52 mm²
Difference: 345.68 mm² (1392%)
T (Typ 701) sensor is approx. 14.92x bigger than D-LUX sensor.
Note: You are comparing sensors of vastly different generations. There is a gap of 11 years between Leica D-LUX (2003) and Leica T (Typ 701) (2014). Eleven years is a huge amount of time, technology wise, resulting in newer sensor being much more efficient than the older one.
Pixel pitch
2.79 µm
4.77 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: 1.98 µm (71%)
Pixel pitch of T (Typ 701) is approx. 71% higher than pixel pitch of D-LUX.
Pixel area
7.78 µm²
22.75 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: 14.97 µm² (192%)
A pixel on Leica T (Typ 701) sensor is approx. 192% bigger than a pixel on Leica D-LUX.
Pixel density
12.87 MP/cm²
4.39 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: 8.48 µm (193%)
Leica D-LUX has approx. 193% higher pixel density than Leica T (Typ 701).
To learn about the accuracy of these numbers, click here.



Specs

Leica D-LUX
Leica T (Typ 701)
Crop factor
6.02
1.53
Total megapixels
16.50
Effective megapixels
16.30
Optical zoom
Yes
Digital zoom
Yes
ISO sensitivity
50, 100, 200, 400
Auto, 100-12500
RAW
Manual focus
Normal focus range
10 cm
Macro focus range
Focal length (35mm equiv.)
35 - 105 mm
Aperture priority
No
Yes
Max. aperture
f2.8 - f4.9
Max. aperture (35mm equiv.)
f16.9 - f29.5
n/a
Metering
Centre weighted, Matrix, Spot
Multi, Center-weighted, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±3 EV (in 1/3 EV steps)
Shutter priority
No
Yes
Min. shutter speed
8 sec
30 sec
Max. shutter speed
1/2000 sec
1/4000 sec
Built-in flash
External flash
Viewfinder
Optical
Electronic (optional)
White balance presets
7
5
Screen size
1.5"
3.7"
Screen resolution
114,000 dots
1,300,000 dots
Video capture
Max. video resolution
1920x1080 (30p)
Storage types
MultiMedia, Secure Digital
SD/SDHC/SDXC
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Li-Ion
BP-DC 13 lithium ion battery
Weight
204 g
384 g
Dimensions
121 x 52 x 34 mm
134 x 69 x 33 mm
Year
2003
2014




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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

Leica D-LUX diagonal

The diagonal of D-LUX sensor is not 1/2.5 or 0.4" (10.2 mm) as you might expect, but approximately two thirds of that value - 7.19 mm. If you want to know why, see sensor sizes.

w = 5.75 mm
h = 4.32 mm
Diagonal =  5.75² + 4.32²   = 7.19 mm

Leica T (Typ 701) diagonal

w = 23.60 mm
h = 15.70 mm
Diagonal =  23.60² + 15.70²   = 28.35 mm


Surface area

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

D-LUX sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 mm²

T (Typ 701) sensor area

Width = 23.60 mm
Height = 15.70 mm

Surface area = 23.60 × 15.70 = 370.52 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

D-LUX pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 2063 pixels
Pixel pitch =   5.75  × 1000  = 2.79 µm
2063

T (Typ 701) pixel pitch

Sensor width = 23.60 mm
Sensor resolution width = 4944 pixels
Pixel pitch =   23.60  × 1000  = 4.77 µm
4944


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

D-LUX pixel area

Pixel pitch = 2.79 µm

Pixel area = 2.79² = 7.78 µm²

T (Typ 701) pixel area

Pixel pitch = 4.77 µm

Pixel area = 4.77² = 22.75 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

D-LUX pixel density

Sensor resolution width = 2063 pixels
Sensor width = 0.575 cm

Pixel density = (2063 / 0.575)² / 1000000 = 12.87 MP/cm²

T (Typ 701) pixel density

Sensor resolution width = 4944 pixels
Sensor width = 2.36 cm

Pixel density = (4944 / 2.36)² / 1000000 = 4.39 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

D-LUX sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 3.20
r = 5.75/4.32 = 1.33
X =  3.20 × 1000000  = 1551
1.33
Resolution horizontal: X × r = 1551 × 1.33 = 2063
Resolution vertical: X = 1551

Sensor resolution = 2063 x 1551

T (Typ 701) sensor resolution

Sensor width = 23.60 mm
Sensor height = 15.70 mm
Effective megapixels = 16.30
r = 23.60/15.70 = 1.5
X =  16.30 × 1000000  = 3296
1.5
Resolution horizontal: X × r = 3296 × 1.5 = 4944
Resolution vertical: X = 3296

Sensor resolution = 4944 x 3296


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


D-LUX crop factor

Sensor diagonal in mm = 7.19 mm
Crop factor =   43.27  = 6.02
7.19

T (Typ 701) crop factor

Sensor diagonal in mm = 28.35 mm
Crop factor =   43.27  = 1.53
28.35

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).

D-LUX equivalent aperture

Crop factor = 6.02
Aperture = f2.8 - f4.9

35-mm equivalent aperture = (f2.8 - f4.9) × 6.02 = f16.9 - f29.5

T (Typ 701) 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 Leica T (Typ 701), take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Leica T (Typ 701) is 1.53

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