Kodak EasyShare M531 vs. Kodak EasyShare M550

Comparison

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Kodak EasyShare M531

Kodak EasyShare M550

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Megapixels

14.50

12.30

Max. image resolution

4288 x 3216

4000 x 3000

Sensor

Sensor type

CCD

Sensor size

1/2.3" (~ 6.16 x 4.62 mm)

Sensor resolution

4392 x 3302

4045 x 3041

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)

Kodak EasyShare M531		Kodak EasyShare M550

Surface area:

28.46 mm²

Difference: 0 mm² (0%)

M531 and M550 sensors are the same size.

Pixel pitch

1.4 µm

1.52 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: 0.12 µm (9%)

Pixel pitch of M550 is approx. 9% higher than pixel pitch of M531.

Pixel area

1.96 µm²

2.31 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: 0.35 µm² (18%)

A pixel on Kodak M550 sensor is approx. 18% bigger than a pixel on Kodak M531.

Pixel density

50.84 MP/cm²

43.12 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: 7.72 µm (18%)

Kodak M531 has approx. 18% higher pixel density than Kodak M550.

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

Specs

Kodak M531

Kodak M550

Crop factor

5.62

Total megapixels

12.70

Effective megapixels

12.30

Optical zoom

Yes

Digital zoom

Yes

ISO sensitivity

Auto, 64, 100, 200, 320, 400, 800, 1000

Auto, 100 - 1600

RAW

Manual focus

Normal focus range

50 cm

Macro focus range

5 cm

10 cm

Focal length (35mm equiv.)

36 - 108 mm

28 - 140 mm

Aperture priority

Max. aperture

f2.8 - f5.0

Max. aperture (35mm equiv.)

n/a

f15.7 - f28.1

Metering

Centre weighted, Multi-segment

Multi, Center-weighted, Spot

Exposure compensation

±2 EV (in 1/3 EV steps)

Shutter priority

Min. shutter speed

1/8 sec

30 sec

Max. shutter speed

1/1400 sec

Built-in flash

External flash

Viewfinder

None

White balance presets

Screen size

2.7"

Screen resolution

230,000 dots

Video capture

Max. video resolution

Storage types

SDHC, Secure Digital

USB

USB 2.0 (480 Mbit/sec)

HDMI

Wireless

GPS

Battery

Li-Ion

Rechargeable Battery KLIC-7006

Weight

130 g

125 g

Dimensions

93.7 x 56.7 x 22.7 mm

98 x 58 x 23 mm

Year

2010

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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

Kodak M531 diagonal

The diagonal of M531 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

Kodak M550 diagonal

The diagonal of M550 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.

M531 sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

M550 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

M531 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4392 pixels

Pixel pitch =	6.16	× 1000	= 1.4 µm
	4392

M550 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4045 pixels

Pixel pitch =	6.16	× 1000	= 1.52 µm
	4045

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

M531 pixel area

Pixel pitch = 1.4 µm

Pixel area = 1.4² = 1.96 µm²

M550 pixel area

Pixel pitch = 1.52 µm

Pixel area = 1.52² = 2.31 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

M531 pixel density

Sensor resolution width = 4392 pixels
Sensor width = 0.616 cm

Pixel density = (4392 / 0.616)² / 1000000 = 50.84 MP/cm²

M550 pixel density

Sensor resolution width = 4045 pixels
Sensor width = 0.616 cm

Pixel density = (4045 / 0.616)² / 1000000 = 43.12 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

M531 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 14.50

r = 6.16/4.62 = 1.33

X = √	14.50 × 1000000	= 3302
	1.33

Resolution horizontal: X × r = 3302 × 1.33 = 4392
Resolution vertical: X = 3302

Sensor resolution = 4392 x 3302

M550 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 12.30

r = 6.16/4.62 = 1.33

X = √	12.30 × 1000000	= 3041
	1.33

Resolution horizontal: X × r = 3041 × 1.33 = 4045
Resolution vertical: X = 3041

Sensor resolution = 4045 x 3041

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

M531 crop factor

Sensor diagonal in mm = 7.70 mm

Crop factor =	43.27	= 5.62
	7.70

M550 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).

M531 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 Kodak M531, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Kodak M531 is 5.62

M550 equivalent aperture

Crop factor = 5.62
Aperture = f2.8 - f5.0

35-mm equivalent aperture = (f2.8 - f5.0) × 5.62 = f15.7 - f28.1

More comparisons of Kodak M531:

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