Nikon Coolpix S7000 vs. Panasonic Lumix DMC-ZS40

Comparison

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Nikon Coolpix S7000

Panasonic Lumix DMC-ZS40

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Megapixels

16.00

18.10

Max. image resolution

4608 x 3456

4896 x 3672

Sensor

Sensor type

CMOS

Sensor size

1/2.3" (~ 6.16 x 4.62 mm)

Sensor resolution

4612 x 3468

4906 x 3689

Diagonal

7.70 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	:	1
(ratio)

Nikon Coolpix S7000		Panasonic Lumix DMC-ZS40

Surface area:

28.46 mm²

Difference: 0 mm² (0%)

S7000 and ZS40 sensors are the same size.

Pixel pitch

1.34 µm

1.26 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: 0.08 µm (6%)

Pixel pitch of S7000 is approx. 6% higher than pixel pitch of ZS40.

Pixel area

1.8 µm²

1.59 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:

Pixel area difference: 0.21 µm² (13%)

A pixel on Nikon S7000 sensor is approx. 13% bigger than a pixel on Panasonic ZS40.

Pixel density

56.06 MP/cm²

63.43 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: 7.37 µm (13%)

Panasonic ZS40 has approx. 13% higher pixel density than Nikon S7000.

To learn about the accuracy of these numbers, click here.

Specs

Nikon S7000

Panasonic ZS40

Crop factor

5.62

Total megapixels

16.76

18.90

Effective megapixels

16.00

18.10

Optical zoom

20x

30x

Digital zoom

Yes

ISO sensitivity

Auto, 125-6400

Auto, 100, 200, 400, 800, 1600, 3200 (6400 with boost)

RAW

Manual focus

Normal focus range

30 cm

50 cm

Macro focus range

1 cm

3 cm

Focal length (35mm equiv.)

25 - 500 mm

24 - 720 mm

Aperture priority

Yes

Max. aperture

f3.4 - f6.5

f3.3 - f6.4

Max. aperture (35mm equiv.)

f19.1 - f36.5

f18.5 - f36

Metering

Multi, Center-weighted, Spot

Exposure compensation

±2 EV (in 1/3 EV steps)

Shutter priority

Yes

Min. shutter speed

4 sec

Max. shutter speed

1/4000 sec

1/2000 sec

Built-in flash

External flash

Viewfinder

None

Electronic

White balance presets

Screen size

Screen resolution

460,000 dots

920,000 dots

Video capture

Max. video resolution

1920x1080 (60i/50i/30p/25p)

1920x1080 (60p/60i/30p)

Storage types

SD/SDHC/SDXC

USB

USB 2.0 (480 Mbit/sec)

HDMI

Wireless

GPS

Battery

Li-ion Battery EN-EL19

Li-ion Battery Pack (3.6V, 1250mAh, 4.5 Wh)

Weight

165 g

240 g

Dimensions

98.8 x 60 x 27.4 mm

110.6 x 64.3 x 34.4 mm

Year

2015

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

Nikon S7000 diagonal

The diagonal of S7000 sensor is not 1/2.3 or 0.43" (11 mm) as you might expect, but approximately two thirds of that value - 7.7 mm. If you want to know why, see sensor sizes.

w = 6.16 mm
h = 4.62 mm

Diagonal = √

6.16² + 4.62²

= 7.70 mm

Panasonic ZS40 diagonal

The diagonal of ZS40 sensor is not 1/2.3 or 0.43" (11 mm) as you might expect, but approximately two thirds of that value - 7.7 mm. If you want to know why, see sensor sizes.

w = 6.16 mm
h = 4.62 mm

Diagonal = √

6.16² + 4.62²

= 7.70 mm

Surface area

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

S7000 sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

ZS40 sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 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

S7000 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4612 pixels

Pixel pitch =	6.16	× 1000	= 1.34 µm
	4612

ZS40 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4906 pixels

Pixel pitch =	6.16	× 1000	= 1.26 µm
	4906

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

S7000 pixel area

Pixel pitch = 1.34 µm

Pixel area = 1.34² = 1.8 µm²

ZS40 pixel area

Pixel pitch = 1.26 µm

Pixel area = 1.26² = 1.59 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

S7000 pixel density

Sensor resolution width = 4612 pixels
Sensor width = 0.616 cm

Pixel density = (4612 / 0.616)² / 1000000 = 56.06 MP/cm²

ZS40 pixel density

Sensor resolution width = 4906 pixels
Sensor width = 0.616 cm

Pixel density = (4906 / 0.616)² / 1000000 = 63.43 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

S7000 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 16.00

r = 6.16/4.62 = 1.33

X = √	16.00 × 1000000	= 3468
	1.33

Resolution horizontal: X × r = 3468 × 1.33 = 4612
Resolution vertical: X = 3468

Sensor resolution = 4612 x 3468

ZS40 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 18.10

r = 6.16/4.62 = 1.33

X = √	18.10 × 1000000	= 3689
	1.33

Resolution horizontal: X × r = 3689 × 1.33 = 4906
Resolution vertical: X = 3689

Sensor resolution = 4906 x 3689

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

S7000 crop factor

Sensor diagonal in mm = 7.70 mm

Crop factor =	43.27	= 5.62
	7.70

ZS40 crop factor

Sensor diagonal in mm = 7.70 mm

Crop factor =	43.27	= 5.62
	7.70

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).

S7000 equivalent aperture

Crop factor = 5.62
Aperture = f3.4 - f6.5

35-mm equivalent aperture = (f3.4 - f6.5) × 5.62 = f19.1 - f36.5

ZS40 equivalent aperture

Crop factor = 5.62
Aperture = f3.3 - f6.4

35-mm equivalent aperture = (f3.3 - f6.4) × 5.62 = f18.5 - f36

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