Kodak EasyShare DX4530 vs. Kodak EasyShare Z812 IS

Comparison

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Kodak EasyShare DX4530

Kodak EasyShare Z812 IS

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Megapixels

5.00

8.10

Max. image resolution

2580 x 1932

3264 x 2448

Sensor

Sensor type

CCD

Sensor size

1/2.5" (~ 5.75 x 4.32 mm)

Sensor resolution

2579 x 1939

3282 x 2468

Diagonal

7.19 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 DX4530		Kodak EasyShare Z812 IS

Surface area:

24.84 mm²

Difference: 0 mm² (0%)

DX4530 and Z812 IS sensors are the same size.

Note: You are comparing cameras of different generations. There is a 4 year gap between Kodak DX4530 (2003) and Kodak Z812 IS (2007). All things being equal, newer sensor generations generally outperform the older.

Pixel pitch

2.23 µm

1.75 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: 0.48 µm (27%)

Pixel pitch of DX4530 is approx. 27% higher than pixel pitch of Z812 IS.

Pixel area

4.97 µm²

3.06 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: 1.91 µm² (62%)

A pixel on Kodak DX4530 sensor is approx. 62% bigger than a pixel on Kodak Z812 IS.

Pixel density

20.12 MP/cm²

32.58 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: 12.46 µm (62%)

Kodak Z812 IS has approx. 62% higher pixel density than Kodak DX4530.

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

Specs

Kodak DX4530

Kodak Z812 IS

Crop factor

6.02

Total megapixels

5.20

8.30

Effective megapixels

5.00

8.10

Optical zoom

12x

Digital zoom

Yes

ISO sensitivity

Auto, (130 - 200)

Auto

RAW

Manual focus

Normal focus range

60 cm

50 cm

Macro focus range

7 cm

12 cm

Focal length (35mm equiv.)

38 - 114 mm

36 - 432 mm

Aperture priority

Yes

Max. aperture

f2.8 - f5.1

f2.8 - f4.8

Max. aperture (35mm equiv.)

f16.9 - f30.7

f16.9 - f28.9

Metering

Multi, Center-weighted, Spot

Exposure compensation

±2 EV (in 1/2 EV steps)

±2 EV (in 1/3 EV steps)

Shutter priority

Yes

Min. shutter speed

4 sec

1/2 sec

Max. shutter speed

1/1700 sec

1/1000 sec

Built-in flash

External flash

Viewfinder

Optical (tunnel)

Electronic

White balance presets

Screen size

1.8"

2.5"

Screen resolution

153,000 dots

230,000 dots

Video capture

Max. video resolution

Storage types

SD/MMC card, Internal

SDHC, Secure Digital

USB

USB 1.0

USB 2.0 (480 Mbit/sec)

HDMI

Wireless

GPS

Battery

AA (2) batteries (NiMH recommended)

AA (2) batteries (NiMH recommended)/ Lithium-Ion KLIC 8000

Weight

210 g

340 g

Dimensions

111 x 66 x 39 mm

109 x 74 x 76 mm

Year

2003

2007

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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 DX4530 diagonal

The diagonal of DX4530 sensor is not 1/2.5 or 0.4" (10.2 mm) as you might expect, but approximately two thirds of that value - 7.19 mm. If you want to know why, see sensor sizes.

w = 5.75 mm
h = 4.32 mm

Diagonal = √

5.75² + 4.32²

= 7.19 mm

Kodak Z812 IS diagonal

The diagonal of Z812 IS sensor is not 1/2.5 or 0.4" (10.2 mm) as you might expect, but approximately two thirds of that value - 7.19 mm. If you want to know why, see sensor sizes.

w = 5.75 mm
h = 4.32 mm

Diagonal = √

5.75² + 4.32²

= 7.19 mm

Surface area

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

DX4530 sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 mm²

Z812 IS sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 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

DX4530 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 2579 pixels

Pixel pitch =	5.75	× 1000	= 2.23 µm
	2579

Z812 IS pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 3282 pixels

Pixel pitch =	5.75	× 1000	= 1.75 µm
	3282

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

DX4530 pixel area

Pixel pitch = 2.23 µm

Pixel area = 2.23² = 4.97 µm²

Z812 IS pixel area

Pixel pitch = 1.75 µm

Pixel area = 1.75² = 3.06 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

DX4530 pixel density

Sensor resolution width = 2579 pixels
Sensor width = 0.575 cm

Pixel density = (2579 / 0.575)² / 1000000 = 20.12 MP/cm²

Z812 IS pixel density

Sensor resolution width = 3282 pixels
Sensor width = 0.575 cm

Pixel density = (3282 / 0.575)² / 1000000 = 32.58 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

DX4530 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 5.00

r = 5.75/4.32 = 1.33

X = √	5.00 × 1000000	= 1939
	1.33

Resolution horizontal: X × r = 1939 × 1.33 = 2579
Resolution vertical: X = 1939

Sensor resolution = 2579 x 1939

Z812 IS sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 8.10

r = 5.75/4.32 = 1.33

X = √	8.10 × 1000000	= 2468
	1.33

Resolution horizontal: X × r = 2468 × 1.33 = 3282
Resolution vertical: X = 2468

Sensor resolution = 3282 x 2468

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

DX4530 crop factor

Sensor diagonal in mm = 7.19 mm

Crop factor =	43.27	= 6.02
	7.19

Z812 IS crop factor

Sensor diagonal in mm = 7.19 mm

Crop factor =	43.27	= 6.02
	7.19

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).

DX4530 equivalent aperture

Crop factor = 6.02
Aperture = f2.8 - f5.1

35-mm equivalent aperture = (f2.8 - f5.1) × 6.02 = f16.9 - f30.7

Z812 IS equivalent aperture

Crop factor = 6.02
Aperture = f2.8 - f4.8

35-mm equivalent aperture = (f2.8 - f4.8) × 6.02 = f16.9 - f28.9

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