Olympus C-3040 Zoom vs. Kodak EasyShare C643

Comparison

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C-3040 Zoom image
vs
EasyShare C643 image
Olympus C-3040 Zoom Kodak EasyShare C643
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Megapixels
3.10
6.10
Max. image resolution
2048 x 1536
2848 x 2134

Sensor

Sensor type
CCD
CCD
Sensor size
1/1.8" (~ 7.11 x 5.33 mm)
1/2.5" (~ 5.75 x 4.32 mm)
Sensor resolution
2031 x 1527
2849 x 2142
Diagonal
8.89 mm
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
1.53 : 1
(ratio)
Olympus C-3040 Zoom Kodak EasyShare C643
Surface area:
37.90 mm² vs 24.84 mm²
Difference: 13.06 mm² (53%)
C-3040 Zoom sensor is approx. 1.53x bigger than C643 sensor.
Note: You are comparing sensors of very different generations. There is a gap of 6 years between Olympus C-3040 Zoom (2000) and Kodak C643 (2006). Six years is a lot of time in terms of technology, meaning newer sensors are overall much more efficient than the older ones.
Pixel pitch
3.5 µm
2.02 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: 1.48 µm (73%)
Pixel pitch of C-3040 Zoom is approx. 73% higher than pixel pitch of C643.
Pixel area
12.25 µm²
4.08 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:
vs
Pixel area difference: 8.17 µm² (200%)
A pixel on Olympus C-3040 Zoom sensor is approx. 200% bigger than a pixel on Kodak C643.
Pixel density
8.16 MP/cm²
24.55 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: 16.39 µm (201%)
Kodak C643 has approx. 201% higher pixel density than Olympus C-3040 Zoom.
To learn about the accuracy of these numbers, click here.



Specs

Olympus C-3040 Zoom
Kodak C643
Crop factor
4.87
6.02
Total megapixels
3.30
6.20
Effective megapixels
3.10
6.10
Optical zoom
3x
3x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100, 200, 400
Auto
RAW
Manual focus
Normal focus range
80 cm
60 cm
Macro focus range
20 cm
13 cm
Focal length (35mm equiv.)
35 - 105 mm
36 - 108 mm
Aperture priority
Yes
No
Max. aperture
f1.8 - f2.6
f2.7 - f4.8
Max. aperture (35mm equiv.)
f8.8 - f12.7
f16.3 - f28.9
Metering
Centre weighted, Matrix, Spot
Centre weighted
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
Yes
No
Min. shutter speed
16 sec
4 sec
Max. shutter speed
1/800 sec
1/1400 sec
Built-in flash
External flash
Viewfinder
Optical (tunnel)
Optical (tunnel)
White balance presets
5
5
Screen size
1.8"
2.4"
Screen resolution
114,000 dots
230,000 dots
Video capture
Max. video resolution
Storage types
SmartMedia
Secure Digital
USB
USB 1.0
USB 1.0
HDMI
Wireless
GPS
Battery
AA (4) batteries (NiMH recommended)
AA (2) batteries (NiMH recommended)
Weight
420 g
145 g
Dimensions
110 x 76 x 70 mm
92.2 x 65.7 x 32.2 mm
Year
2000
2006




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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

Olympus C-3040 Zoom diagonal

The diagonal of C-3040 Zoom 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

Kodak C643 diagonal

The diagonal of C643 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.

C-3040 Zoom sensor area

Width = 7.11 mm
Height = 5.33 mm

Surface area = 7.11 × 5.33 = 37.90 mm²

C643 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

C-3040 Zoom pixel pitch

Sensor width = 7.11 mm
Sensor resolution width = 2031 pixels
Pixel pitch =   7.11  × 1000  = 3.5 µm
2031

C643 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 2849 pixels
Pixel pitch =   5.75  × 1000  = 2.02 µm
2849


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

C-3040 Zoom pixel area

Pixel pitch = 3.5 µm

Pixel area = 3.5² = 12.25 µm²

C643 pixel area

Pixel pitch = 2.02 µm

Pixel area = 2.02² = 4.08 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

C-3040 Zoom pixel density

Sensor resolution width = 2031 pixels
Sensor width = 0.711 cm

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

C643 pixel density

Sensor resolution width = 2849 pixels
Sensor width = 0.575 cm

Pixel density = (2849 / 0.575)² / 1000000 = 24.55 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

C-3040 Zoom 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

C643 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 6.10
r = 5.75/4.32 = 1.33
X =  6.10 × 1000000  = 2142
1.33
Resolution horizontal: X × r = 2142 × 1.33 = 2849
Resolution vertical: X = 2142

Sensor resolution = 2849 x 2142


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


C-3040 Zoom crop factor

Sensor diagonal in mm = 8.89 mm
Crop factor =   43.27  = 4.87
8.89

C643 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).

C-3040 Zoom equivalent aperture

Crop factor = 4.87
Aperture = f1.8 - f2.6

35-mm equivalent aperture = (f1.8 - f2.6) × 4.87 = f8.8 - f12.7

C643 equivalent aperture

Crop factor = 6.02
Aperture = f2.7 - f4.8

35-mm equivalent aperture = (f2.7 - f4.8) × 6.02 = f16.3 - f28.9

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