Kodak EasyShare DX6490 vs. Sony Cyber-shot DSC-F828
Comparison
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Kodak EasyShare DX6490 | Sony Cyber-shot DSC-F828 | ||||
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Megapixels
4.00
8.00
Max. image resolution
2304 x 1728
3264 x 2448
Sensor
Sensor type
CCD
CCD
Sensor size
1/2.5" (~ 5.75 x 4.32 mm)
2/3" (~ 8.8 x 6.6 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 »
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 »
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1 | : | 2.34 |
(ratio) | ||
Kodak EasyShare DX6490 | Sony Cyber-shot DSC-F828 |
Surface area:
24.84 mm² | vs | 58.08 mm² |
Difference: 33.24 mm² (134%)
F828 sensor is approx. 2.34x bigger than DX6490 sensor.
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.
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.
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.
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: 1.09 µm² (18%)
A pixel on Sony F828 sensor is approx. 18% bigger than a pixel on Kodak DX6490.
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.
Higher pixel density means smaller pixels and lower pixel density means larger pixels.
To learn about the accuracy of these numbers,
click here.
Specs
Kodak DX6490
Sony F828
Total megapixels
4.20
Effective megapixels
4.00
Optical zoom
10x
7.1x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 80, 100, 200, 400, 800
Auto, 100, 200, 400, 800
RAW
Manual focus
Normal focus range
60 cm
50 cm
Macro focus range
12 cm
2 cm
Focal length (35mm equiv.)
38 - 380 mm
28 - 200 mm
Aperture priority
Yes
Yes
Max. aperture
f2.8 - f3.7
f2.0 - f2.8
Metering
Multi, Center-weighted, Spot
Centre weighted, Multi-segment, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
Yes
Yes
Min. shutter speed
16 sec
30 sec
Max. shutter speed
1/1700 sec
1/3200 sec
Built-in flash
External flash
Viewfinder
Electronic
Electronic
White balance presets
4
7
Screen size
2.2"
1.8"
Screen resolution
153,000 dots
134,000 dots
Video capture
Max. video resolution
Storage types
SD/MMC card, Internal
CompactFlash type I, CompactFlash type II, Memory Stick, Memory
USB
USB 1.0
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Kodak Lithium-Ion, dock (optional)
AAA (2) batteries NiMH supplied
Weight
380 g
832 g
Dimensions
100 x 80 x 81 mm
134 x 91 x 156 mm
Year
2003
2003
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Diagonal
Diagonal is calculated by the use of Pythagorean theorem:
where w = sensor width and h = sensor height
Diagonal = √ | w² + h² |
Kodak DX6490 diagonal
The diagonal of DX6490 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
w = 5.75 mm
h = 4.32 mm
Diagonal = √ | 5.75² + 4.32² | = 7.19 mm |
Sony F828 diagonal
The diagonal of F828 sensor is not 2/3 or 0.67" (16.9 mm) as you might expect, but approximately two thirds of
that value - 11 mm. If you want to know why, see
sensor sizes.
w = 8.80 mm
h = 6.60 mm
w = 8.80 mm
h = 6.60 mm
Diagonal = √ | 8.80² + 6.60² | = 11.00 mm |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
DX6490 sensor area
Width = 5.75 mm
Height = 4.32 mm
Surface area = 5.75 × 4.32 = 24.84 mm²
Height = 4.32 mm
Surface area = 5.75 × 4.32 = 24.84 mm²
F828 sensor area
Width = 8.80 mm
Height = 6.60 mm
Surface area = 8.80 × 6.60 = 58.08 mm²
Height = 6.60 mm
Surface area = 8.80 × 6.60 = 58.08 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 |
DX6490 pixel pitch
Sensor width = 5.75 mm
Sensor resolution width = 2306 pixels
Sensor resolution width = 2306 pixels
Pixel pitch = | 5.75 | × 1000 | = 2.49 µm |
2306 |
F828 pixel pitch
Sensor width = 8.80 mm
Sensor resolution width = 3262 pixels
Sensor resolution width = 3262 pixels
Pixel pitch = | 8.80 | × 1000 | = 2.7 µm |
3262 |
Pixel area
The area of one pixel can be calculated by simply squaring the pixel pitch:
You could also divide sensor surface area with effective megapixels:
Pixel area = pixel pitch²
You could also divide sensor surface area with effective megapixels:
Pixel area = | sensor surface area in mm² |
effective megapixels |
DX6490 pixel area
Pixel pitch = 2.49 µm
Pixel area = 2.49² = 6.2 µm²
Pixel area = 2.49² = 6.2 µm²
F828 pixel area
Pixel pitch = 2.7 µm
Pixel area = 2.7² = 7.29 µm²
Pixel area = 2.7² = 7.29 µm²
Pixel density
Pixel density can be calculated with the following formula:
One could also use this 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 |
DX6490 pixel density
Sensor resolution width = 2306 pixels
Sensor width = 0.575 cm
Pixel density = (2306 / 0.575)² / 1000000 = 16.08 MP/cm²
Sensor width = 0.575 cm
Pixel density = (2306 / 0.575)² / 1000000 = 16.08 MP/cm²
F828 pixel density
Sensor resolution width = 3262 pixels
Sensor width = 0.88 cm
Pixel density = (3262 / 0.88)² / 1000000 = 13.74 MP/cm²
Sensor width = 0.88 cm
Pixel density = (3262 / 0.88)² / 1000000 = 13.74 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:
3. To get sensor resolution we then multiply X with the corresponding ratio:
Resolution horizontal: X × r
Resolution vertical: X
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 → |
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Resolution horizontal: X × r
Resolution vertical: X
DX6490 sensor resolution
Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 4.00
Resolution horizontal: X × r = 1734 × 1.33 = 2306
Resolution vertical: X = 1734
Sensor resolution = 2306 x 1734
Sensor height = 4.32 mm
Effective megapixels = 4.00
r = 5.75/4.32 = 1.33 |
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Resolution vertical: X = 1734
Sensor resolution = 2306 x 1734
F828 sensor resolution
Sensor width = 8.80 mm
Sensor height = 6.60 mm
Effective megapixels = 8.00
Resolution horizontal: X × r = 2453 × 1.33 = 3262
Resolution vertical: X = 2453
Sensor resolution = 3262 x 2453
Sensor height = 6.60 mm
Effective megapixels = 8.00
r = 8.80/6.60 = 1.33 |
|
Resolution vertical: X = 2453
Sensor resolution = 3262 x 2453
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 |
DX6490 crop factor
Sensor diagonal in mm = 7.19 mm
Crop factor = | 43.27 | = 6.02 |
7.19 |
F828 crop factor
Sensor diagonal in mm = 11.00 mm
Crop factor = | 43.27 | = 3.93 |
11.00 |
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).
DX6490 equivalent aperture
Crop factor = 6.02
Aperture = f2.8 - f3.7
35-mm equivalent aperture = (f2.8 - f3.7) × 6.02 = f16.9 - f22.3
Aperture = f2.8 - f3.7
35-mm equivalent aperture = (f2.8 - f3.7) × 6.02 = f16.9 - f22.3
F828 equivalent aperture
Crop factor = 3.93
Aperture = f2.0 - f2.8
35-mm equivalent aperture = (f2.0 - f2.8) × 3.93 = f7.9 - f11
Aperture = f2.0 - f2.8
35-mm equivalent aperture = (f2.0 - f2.8) × 3.93 = f7.9 - f11
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