Kodak EasyShare CX7330 vs. Kodak DC4800

Comparison

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Kodak EasyShare CX7330

Kodak DC4800

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Megapixels

3.10

Max. image resolution

2032 x 1524

2160 x 1440

Sensor

Sensor type

CCD

Sensor size

1/2.5" (~ 5.75 x 4.32 mm)

1/1.76" (~ 7.27 x 5.46 mm)

Sensor resolution

2031 x 1527

Diagonal

7.19 mm

9.09 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	:	1.6
(ratio)

Kodak EasyShare CX7330		Kodak DC4800

Surface area:

24.84 mm²

39.69 mm²

Difference: 14.85 mm² (60%)

DC4800 sensor is approx. 1.6x bigger than CX7330 sensor.

Note: You are comparing cameras of different generations. There is a 4 year gap between Kodak CX7330 (2004) and Kodak DC4800 (2000). All things being equal, newer sensor generations generally outperform the older.

Pixel pitch

2.83 µm

3.58 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: 0.75 µm (27%)

Pixel pitch of DC4800 is approx. 27% higher than pixel pitch of CX7330.

Pixel area

8.01 µm²

12.82 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: 4.81 µm² (60%)

A pixel on Kodak DC4800 sensor is approx. 60% bigger than a pixel on Kodak CX7330.

Pixel density

12.48 MP/cm²

7.8 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: 4.68 µm (60%)

Kodak CX7330 has approx. 60% higher pixel density than Kodak DC4800.

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

Specs

Kodak CX7330

Kodak DC4800

Crop factor

6.02

4.76

Total megapixels

3.30

Effective megapixels

3.10

Optical zoom

Digital zoom

Yes

ISO sensitivity

Auto

100, 200, 400

RAW

Manual focus

Normal focus range

60 cm

50 cm

Macro focus range

13 cm

20 cm

Focal length (35mm equiv.)

37 - 111 mm

28 - 84 mm

Aperture priority

Yes

Max. aperture

f2.7 - f4.6

f2.8 - f5.6

Max. aperture (35mm equiv.)

f16.3 - f27.7

f13.3 - f26.7

Metering

Matrix, Multi-pattern

Centre weighted, Multi Spot

Exposure compensation

±2 EV (in 1/2 EV steps)

Shutter priority

Yes

Min. shutter speed

1/2 sec

16 sec

Max. shutter speed

1/1400 sec

1/1000 sec

Built-in flash

External flash

Viewfinder

Optical (tunnel)

White balance presets

Screen size

1.6"

1.8"

Screen resolution

61,000 dots

72,000 dots

Video capture

Max. video resolution

Storage types

MultiMedia, Secure Digital

CompactFlash type I

USB

USB 1.0

HDMI

Wireless

GPS

Battery

AA (2) batteries (NiMH recommended)

Kodak Lithium-Ion

Weight

175 g

320 g

Dimensions

102.5 x 65 x 38 mm

120 x 69 x 65 mm

Year

2004

2000

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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 CX7330 diagonal

The diagonal of CX7330 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 DC4800 diagonal

The diagonal of DC4800 sensor is not 1/1.76 or 0.57" (14.4 mm) as you might expect, but approximately two thirds of that value - 9.09 mm. If you want to know why, see sensor sizes.

w = 7.27 mm
h = 5.46 mm

Diagonal = √

7.27² + 5.46²

= 9.09 mm

Surface area

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

CX7330 sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 mm²

DC4800 sensor area

Width = 7.27 mm
Height = 5.46 mm

Surface area = 7.27 × 5.46 = 39.69 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

CX7330 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 2031 pixels

Pixel pitch =	5.75	× 1000	= 2.83 µm
	2031

DC4800 pixel pitch

Sensor width = 7.27 mm
Sensor resolution width = 2031 pixels

Pixel pitch =	7.27	× 1000	= 3.58 µm
	2031

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

CX7330 pixel area

Pixel pitch = 2.83 µm

Pixel area = 2.83² = 8.01 µm²

DC4800 pixel area

Pixel pitch = 3.58 µm

Pixel area = 3.58² = 12.82 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

CX7330 pixel density

Sensor resolution width = 2031 pixels
Sensor width = 0.575 cm

Pixel density = (2031 / 0.575)² / 1000000 = 12.48 MP/cm²

DC4800 pixel density

Sensor resolution width = 2031 pixels
Sensor width = 0.727 cm

Pixel density = (2031 / 0.727)² / 1000000 = 7.8 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

CX7330 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 3.10

r = 5.75/4.32 = 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

DC4800 sensor resolution

Sensor width = 7.27 mm
Sensor height = 5.46 mm
Effective megapixels = 3.10

r = 7.27/5.46 = 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

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

CX7330 crop factor

Sensor diagonal in mm = 7.19 mm

Crop factor =	43.27	= 6.02
	7.19

DC4800 crop factor

Sensor diagonal in mm = 9.09 mm

Crop factor =	43.27	= 4.76
	9.09

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).

CX7330 equivalent aperture

Crop factor = 6.02
Aperture = f2.7 - f4.6

35-mm equivalent aperture = (f2.7 - f4.6) × 6.02 = f16.3 - f27.7

DC4800 equivalent aperture

Crop factor = 4.76
Aperture = f2.8 - f5.6

35-mm equivalent aperture = (f2.8 - f5.6) × 4.76 = f13.3 - f26.7

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