Nokia 808 PureView vs. Panasonic Lumix DMC-LX7

Comparison

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808 PureView image
vs
Lumix DMC-LX7 image
Nokia 808 PureView Panasonic Lumix DMC-LX7
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Megapixels
41.48
10.10
Max. image resolution
7152 x 5368
3648 x 2736

Sensor

Sensor type
CMOS
CMOS
Sensor size
10.82 x 7.52 mm
1/1.7" (~ 7.53 x 5.64 mm)
Sensor resolution
7728 x 5367
3678 x 2745
Diagonal
13.18 mm
9.41 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
1.92 : 1
(ratio)
Nokia 808 PureView Panasonic Lumix DMC-LX7
Surface area:
81.37 mm² vs 42.47 mm²
Difference: 38.9 mm² (92%)
808 PureView sensor is approx. 1.92x bigger than LX7 sensor.
Pixel pitch
1.4 µm
2.05 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: 0.65 µm (46%)
Pixel pitch of LX7 is approx. 46% higher than pixel pitch of 808 PureView.
Pixel area
1.96 µm²
4.2 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: 2.24 µm² (114%)
A pixel on Panasonic LX7 sensor is approx. 114% bigger than a pixel on Nokia 808 PureView.
Pixel density
51.01 MP/cm²
23.86 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: 27.15 µm (114%)
Nokia 808 PureView has approx. 114% higher pixel density than Panasonic LX7.
To learn about the accuracy of these numbers, click here.



Specs

Nokia 808 PureView
Panasonic LX7
Crop factor
3.28
4.6
Total megapixels
41.48
12.80
Effective megapixels
10.10
Optical zoom
3.8x
Digital zoom
Yes
Yes
ISO sensitivity
50 - 1600
Auto, 80, 100, 200, 400, 800, 1600, 3200, 6400, (12800 with boost)
RAW
Manual focus
Normal focus range
50 cm
Macro focus range
15 cm
1 cm
Focal length (35mm equiv.)
28 mm
24 - 90 mm
Aperture priority
Yes
Max. aperture
f2.4
f1.4 - f2.3
Max. aperture (35mm equiv.)
f7.9
f6.4 - f10.6
Metering
Multi, Center-weighted, Spot
Exposure compensation
±3 EV (in 1/3 EV steps)
Shutter priority
Yes
Min. shutter speed
60 sec
Max. shutter speed
1/4000 sec
Built-in flash
External flash
Viewfinder
Electronic (optional)
White balance presets
4
5
Screen size
4"
3"
Screen resolution
640 x 360 dots
920,000 dots
Video capture
Max. video resolution
1920x1080 (60p/60i/30p)
Storage types
16 GB on-board memory
SD/SDHC/SDXC, Internal
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Li-Ion 1400 mAh (BV-4D)
Lithium-Ion rechargeable battery
Weight
169 g
298 g
Dimensions
123.9 x 60.2 x 13.9 mm
111 x 68 x 46 mm
Year
2012
2012




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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

Nokia 808 PureView diagonal

w = 10.82 mm
h = 7.52 mm
Diagonal =  10.82² + 7.52²   = 13.18 mm

Panasonic LX7 diagonal

The diagonal of LX7 sensor is not 1/1.7 or 0.59" (14.9 mm) as you might expect, but approximately two thirds of that value - 9.41 mm. If you want to know why, see sensor sizes.

w = 7.53 mm
h = 5.64 mm
Diagonal =  7.53² + 5.64²   = 9.41 mm


Surface area

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

808 PureView sensor area

Width = 10.82 mm
Height = 7.52 mm

Surface area = 10.82 × 7.52 = 81.37 mm²

LX7 sensor area

Width = 7.53 mm
Height = 5.64 mm

Surface area = 7.53 × 5.64 = 42.47 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

808 PureView pixel pitch

Sensor width = 10.82 mm
Sensor resolution width = 7728 pixels
Pixel pitch =   10.82  × 1000  = 1.4 µm
7728

LX7 pixel pitch

Sensor width = 7.53 mm
Sensor resolution width = 3678 pixels
Pixel pitch =   7.53  × 1000  = 2.05 µm
3678


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

808 PureView pixel area

Pixel pitch = 1.4 µm

Pixel area = 1.4² = 1.96 µm²

LX7 pixel area

Pixel pitch = 2.05 µm

Pixel area = 2.05² = 4.2 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

808 PureView pixel density

Sensor resolution width = 7728 pixels
Sensor width = 1.082 cm

Pixel density = (7728 / 1.082)² / 1000000 = 51.01 MP/cm²

LX7 pixel density

Sensor resolution width = 3678 pixels
Sensor width = 0.753 cm

Pixel density = (3678 / 0.753)² / 1000000 = 23.86 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

808 PureView sensor resolution

Sensor width = 10.82 mm
Sensor height = 7.52 mm
Effective megapixels = 41.48
r = 10.82/7.52 = 1.44
X =  41.48 × 1000000  = 5367
1.44
Resolution horizontal: X × r = 5367 × 1.44 = 7728
Resolution vertical: X = 5367

Sensor resolution = 7728 x 5367

LX7 sensor resolution

Sensor width = 7.53 mm
Sensor height = 5.64 mm
Effective megapixels = 10.10
r = 7.53/5.64 = 1.34
X =  10.10 × 1000000  = 2745
1.34
Resolution horizontal: X × r = 2745 × 1.34 = 3678
Resolution vertical: X = 2745

Sensor resolution = 3678 x 2745


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


808 PureView crop factor

Sensor diagonal in mm = 13.18 mm
Crop factor =   43.27  = 3.28
13.18

LX7 crop factor

Sensor diagonal in mm = 9.41 mm
Crop factor =   43.27  = 4.6
9.41

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).

808 PureView equivalent aperture

Crop factor = 3.28
Aperture = f2.4

35-mm equivalent aperture = (f2.4) × 3.28 = f7.9

LX7 equivalent aperture

Crop factor = 4.6
Aperture = f1.4 - f2.3

35-mm equivalent aperture = (f1.4 - f2.3) × 4.6 = f6.4 - f10.6

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