Leica Digilux vs. Leica D-Lux 7

Comparison

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Digilux image
vs
D-Lux 7 image
Leica Digilux Leica D-Lux 7
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Megapixels
1.30
17.00
Max. image resolution
1280 x 1024
4736 x 3552

Sensor

Sensor type
CCD
CMOS
Sensor size
1/2" (~ 6.4 x 4.8 mm)
Four Thirds (17.3 x 13 mm)
Sensor resolution
1315 x 989
4755 x 3575
Diagonal
8.00 mm
21.64 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 : 7.32
(ratio)
Leica Digilux Leica D-Lux 7
Surface area:
30.72 mm² vs 224.90 mm²
Difference: 194.18 mm² (632%)
D-Lux 7 sensor is approx. 7.32x bigger than Digilux sensor.
Note: You are comparing sensors of vastly different generations. There is a gap of 20 years between Leica Digilux (1998) and Leica D-Lux 7 (2018). Twenty years is a huge amount of time, technology wise, resulting in newer sensor being much more efficient than the older one.
Pixel pitch
4.87 µm
3.64 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: 1.23 µm (34%)
Pixel pitch of Digilux is approx. 34% higher than pixel pitch of D-Lux 7.
Pixel area
23.72 µm²
13.25 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: 10.47 µm² (79%)
A pixel on Leica Digilux sensor is approx. 79% bigger than a pixel on Leica D-Lux 7.
Pixel density
4.22 MP/cm²
7.55 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: 3.33 µm (79%)
Leica D-Lux 7 has approx. 79% higher pixel density than Leica Digilux.
To learn about the accuracy of these numbers, click here.



Specs

Leica Digilux
Leica D-Lux 7
Crop factor
5.41
2
Total megapixels
1.50
21.77
Effective megapixels
1.30
17.00
Optical zoom
1x
3.1x
Digital zoom
Yes
Yes
ISO sensitivity
100
Auto, 200-25600 (extendable to 100)
RAW
Manual focus
Normal focus range
50 cm
50 cm
Macro focus range
9 cm
3 cm
Focal length (35mm equiv.)
35 mm
24 - 75 mm
Aperture priority
No
Yes
Max. aperture
f3.2 - f8.0
f1.7 - f2.8
Max. aperture (35mm equiv.)
f17.3 - f43.3
f3.4 - f5.6
Metering
Multi, Center-weighted, Spot
Multi, Center-weighted, Spot
Exposure compensation
-0.9 - +1.5 EV (in 1/3 EV steps)
±5 EV (in 1/3 EV steps)
Shutter priority
No
Yes
Min. shutter speed
1/4 sec
60 sec
Max. shutter speed
1/1000 sec
1/16000 sec
Built-in flash
External flash
Viewfinder
Optical (tunnel)
Electronic
White balance presets
4
5
Screen size
2"
3"
Screen resolution
110,000 dots
1,240,000 dots
Video capture
Max. video resolution
3840x2160 (30p/24p)
Storage types
SmartMedia
SD/SDHC/SDXC
USB
USB 1.0
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion (NP-100)
Li-ion Battery Pack
Weight
260 g
403 g
Dimensions
80 x 101 x 33 mm
118 x 66 x 64 mm
Year
1998
2018




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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 Digilux diagonal

The diagonal of Digilux sensor is not 1/2 or 0.5" (12.7 mm) as you might expect, but approximately two thirds of that value - 8 mm. If you want to know why, see sensor sizes.

w = 6.40 mm
h = 4.80 mm
Diagonal =  6.40² + 4.80²   = 8.00 mm

Leica D-Lux 7 diagonal

w = 17.30 mm
h = 13.00 mm
Diagonal =  17.30² + 13.00²   = 21.64 mm


Surface area

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

Digilux sensor area

Width = 6.40 mm
Height = 4.80 mm

Surface area = 6.40 × 4.80 = 30.72 mm²

D-Lux 7 sensor area

Width = 17.30 mm
Height = 13.00 mm

Surface area = 17.30 × 13.00 = 224.90 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

Digilux pixel pitch

Sensor width = 6.40 mm
Sensor resolution width = 1315 pixels
Pixel pitch =   6.40  × 1000  = 4.87 µm
1315

D-Lux 7 pixel pitch

Sensor width = 17.30 mm
Sensor resolution width = 4755 pixels
Pixel pitch =   17.30  × 1000  = 3.64 µm
4755


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

Digilux pixel area

Pixel pitch = 4.87 µm

Pixel area = 4.87² = 23.72 µm²

D-Lux 7 pixel area

Pixel pitch = 3.64 µm

Pixel area = 3.64² = 13.25 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

Digilux pixel density

Sensor resolution width = 1315 pixels
Sensor width = 0.64 cm

Pixel density = (1315 / 0.64)² / 1000000 = 4.22 MP/cm²

D-Lux 7 pixel density

Sensor resolution width = 4755 pixels
Sensor width = 1.73 cm

Pixel density = (4755 / 1.73)² / 1000000 = 7.55 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

Digilux sensor resolution

Sensor width = 6.40 mm
Sensor height = 4.80 mm
Effective megapixels = 1.30
r = 6.40/4.80 = 1.33
X =  1.30 × 1000000  = 989
1.33
Resolution horizontal: X × r = 989 × 1.33 = 1315
Resolution vertical: X = 989

Sensor resolution = 1315 x 989

D-Lux 7 sensor resolution

Sensor width = 17.30 mm
Sensor height = 13.00 mm
Effective megapixels = 17.00
r = 17.30/13.00 = 1.33
X =  17.00 × 1000000  = 3575
1.33
Resolution horizontal: X × r = 3575 × 1.33 = 4755
Resolution vertical: X = 3575

Sensor resolution = 4755 x 3575


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


Digilux crop factor

Sensor diagonal in mm = 8.00 mm
Crop factor =   43.27  = 5.41
8.00

D-Lux 7 crop factor

Sensor diagonal in mm = 21.64 mm
Crop factor =   43.27  = 2
21.64

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).

Digilux equivalent aperture

Crop factor = 5.41
Aperture = f3.2 - f8.0

35-mm equivalent aperture = (f3.2 - f8.0) × 5.41 = f17.3 - f43.3

D-Lux 7 equivalent aperture

Crop factor = 2
Aperture = f1.7 - f2.8

35-mm equivalent aperture = (f1.7 - f2.8) × 2 = f3.4 - f5.6

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