Casio QV-3000EX vs. Nikon Coolpix 800

Comparison

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Casio QV-3000EX

Nikon Coolpix 800

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Megapixels

3.10

1.90

Max. image resolution

2048 x 1536

1600 x 1200

Sensor

Sensor type

CCD

Sensor size

1/1.8" (~ 7.11 x 5.33 mm)

1/2" (~ 6.4 x 4.8 mm)

Sensor resolution

2031 x 1527

1589 x 1195

Diagonal

8.89 mm

8.00 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
1.23	:	1
(ratio)

Casio QV-3000EX		Nikon Coolpix 800

Surface area:

37.90 mm²

30.72 mm²

Difference: 7.18 mm² (23%)

QV-3000EX sensor is approx. 1.23x bigger than 800 sensor.

Pixel pitch

3.5 µm

4.03 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: 0.53 µm (15%)

Pixel pitch of 800 is approx. 15% higher than pixel pitch of QV-3000EX.

Pixel area

12.25 µm²

16.24 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: 3.99 µm² (33%)

A pixel on Nikon 800 sensor is approx. 33% bigger than a pixel on Casio QV-3000EX.

Pixel density

8.16 MP/cm²

6.16 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: 2 µm (32%)

Casio QV-3000EX has approx. 32% higher pixel density than Nikon 800.

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

Specs

Casio QV-3000EX

Nikon 800

Crop factor

4.87

5.41

Total megapixels

3.30

2.10

Effective megapixels

3.10

1.90

Optical zoom

Digital zoom

Yes

ISO sensitivity

100, 200, 400

RAW

Manual focus

Normal focus range

30 cm

Macro focus range

6 cm

7 cm

Focal length (35mm equiv.)

33 - 100 mm

38 - 76 mm

Aperture priority

Yes

Max. aperture

f2.0 - f2.5

f3.5 - f4.8

Max. aperture (35mm equiv.)

f9.7 - f12.2

f18.9 - f26

Metering

Centre weighted, Evaluative, Spot

Centre weighted, Matrix, Spot

Exposure compensation

±2 EV (in 1/3 EV steps)

Shutter priority

Yes

Min. shutter speed

2 sec

8 sec

Max. shutter speed

1/1000 sec

1/750 sec

Built-in flash

External flash

Viewfinder

Optical (tunnel)

White balance presets

Screen size

1.8"

Screen resolution

122,000 dots

112,000 dots

Video capture

Max. video resolution

Storage types

CompactFlash type I, CompactFlash type II, Microdrive

CompactFlash type I

USB

USB 1.0

HDMI

Wireless

GPS

Battery

AA NiMH (4) batteries (supplied)

AA (4) batteries (NiMH recommended)

Weight

320 g

380 g

Dimensions

134.5 x 80.5 x 57.5 mm

119 x 69 x 61 mm

Year

2000

1999

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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

Casio QV-3000EX diagonal

The diagonal of QV-3000EX sensor is not 1/1.8 or 0.56" (14.1 mm) as you might expect, but approximately two thirds of that value - 8.89 mm. If you want to know why, see sensor sizes.

w = 7.11 mm
h = 5.33 mm

Diagonal = √

7.11² + 5.33²

= 8.89 mm

Nikon 800 diagonal

The diagonal of 800 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

Surface area

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

QV-3000EX sensor area

Width = 7.11 mm
Height = 5.33 mm

Surface area = 7.11 × 5.33 = 37.90 mm²

800 sensor area

Width = 6.40 mm
Height = 4.80 mm

Surface area = 6.40 × 4.80 = 30.72 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

QV-3000EX pixel pitch

Sensor width = 7.11 mm
Sensor resolution width = 2031 pixels

Pixel pitch =	7.11	× 1000	= 3.5 µm
	2031

800 pixel pitch

Sensor width = 6.40 mm
Sensor resolution width = 1589 pixels

Pixel pitch =	6.40	× 1000	= 4.03 µm
	1589

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

QV-3000EX pixel area

Pixel pitch = 3.5 µm

Pixel area = 3.5² = 12.25 µm²

800 pixel area

Pixel pitch = 4.03 µm

Pixel area = 4.03² = 16.24 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

QV-3000EX pixel density

Sensor resolution width = 2031 pixels
Sensor width = 0.711 cm

Pixel density = (2031 / 0.711)² / 1000000 = 8.16 MP/cm²

800 pixel density

Sensor resolution width = 1589 pixels
Sensor width = 0.64 cm

Pixel density = (1589 / 0.64)² / 1000000 = 6.16 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

QV-3000EX sensor resolution

Sensor width = 7.11 mm
Sensor height = 5.33 mm
Effective megapixels = 3.10

r = 7.11/5.33 = 1.33

X = √	3.10 × 1000000	= 1527
	1.33

Resolution horizontal: X × r = 1527 × 1.33 = 2031
Resolution vertical: X = 1527

Sensor resolution = 2031 x 1527

800 sensor resolution

Sensor width = 6.40 mm
Sensor height = 4.80 mm
Effective megapixels = 1.90

r = 6.40/4.80 = 1.33

X = √	1.90 × 1000000	= 1195
	1.33

Resolution horizontal: X × r = 1195 × 1.33 = 1589
Resolution vertical: X = 1195

Sensor resolution = 1589 x 1195

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

QV-3000EX crop factor

Sensor diagonal in mm = 8.89 mm

Crop factor =	43.27	= 4.87
	8.89

800 crop factor

Sensor diagonal in mm = 8.00 mm

Crop factor =	43.27	= 5.41
	8.00

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).

QV-3000EX equivalent aperture

Crop factor = 4.87
Aperture = f2.0 - f2.5

35-mm equivalent aperture = (f2.0 - f2.5) × 4.87 = f9.7 - f12.2

800 equivalent aperture

Crop factor = 5.41
Aperture = f3.5 - f4.8

35-mm equivalent aperture = (f3.5 - f4.8) × 5.41 = f18.9 - f26

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