Sony Cybershot DSC F828 vs. Canon PowerShot S90

Comparison

Cybershot DSC F828 image
vs.
PowerShot S90 image

Comparison

Sony Cybershot DSC F828 Canon PowerShot S90
Megapixels
8.00 10.00
Max. resolution
3264 x 2448 3648 x 2736
Price
Amazon, B&H Photo, Adorama Amazon, B&H Photo, Adorama

Sensor

Sensor type
CCD CCD
Sensor size
2/3" (~ 8.8 x 6.6 mm) 1/1.7" (~ 7.53 x 5.64 mm)
Sensor resolution
3262 x 2453  3661 x 2732 
Diagonal
11.00 mm  9.41 mm 
Surface area
58.08 mm²  42.47 mm² 
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 sizes:
Sony Cybershot DSC F828
vs.
Canon PowerShot S90
 
Surface area:
Sony Cybershot DSC F828
Canon PowerShot S90
Difference: 15.61 mm² (37%)
Sony Cybershot DSC F828 has approx. 37% more surface area than Canon PowerShot S90.
Note: You are comparing sensors of very different generations. There is a gap of 6 years between Sony Cybershot DSC F828 (2003) and Canon PowerShot S90 (2009). 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
2.7 µm  2.06 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.
Pixel pitch
Sony Cybershot DSC F828
Canon PowerShot S90
Difference: 0.64 µm (31%)
Pixel pitch of Sony Cybershot DSC F828 is approx. 31% higher than pixel pitch of Canon PowerShot S90.
Pixel area
7.29 µm²  4.24 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:
Sony Cybershot DSC F828
vs.
Canon PowerShot S90
Pixel area difference: 3.05 µm² (72%)
A pixel on Sony Cybershot DSC F828 sensor is approx. 72% bigger than a pixel on Canon PowerShot S90.
Pixel density
13.74 MP/cm²  23.64 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.
Pixel density
Sony Cybershot DSC F828
Canon PowerShot S90
Difference: 9.9 MP/cm² (72%)
Canon PowerShot S90 has approx. 72% higher pixel density than Sony Cybershot DSC F828.
To learn about the accuracy of these numbers, click here.

Other specifications

Crop factor
3.93  4.6 
Total megapixels
n/a 10.40
Effective megapixels
n/a 10.00
Optical zoom
7.1x 3.8x
Digital zoom
Yes Yes
Iso
Auto, 100, 200, 400, 800 Auto, 80, 100, 125, 160, 200, 250, 320, 400, 500, 640, 800, 1000
Auto focus
Yes Yes
Manual focus
Yes Yes
Normal focus range
50 cm 50 cm
Macro focus range
2 cm 5 cm
Focal length (35mm equiv.)
28 - 200 mm 28 - 105 mm
Aperture priority
Yes Yes
Aperture
f2.0 - f2.8 f2.0 - f4.9
Aperture (35mm equiv.)
f7.9 - f11  f9.2 - f22.5 
Metering
Centre weighted, Multi-segment, Spot Multi, Center-weighted, Spot
Exposure compensation
-2EV - +2EV with 1/3EV steps ±2 EV (at 1/3 EV steps)
Shutter priority
Yes Yes
Min. shutter speed
30 sec 15 sec
Max. shutter speed
1/3200 sec 1/1600 sec
Flash modes
Anti red-eye, Auto, Fill in, Off, Slow flash Auto, On, Off, Red-Eye, Slow Sync
Built-in flash
Yes Yes
External flash
Yes No
Viewfinder
Electronic None
White balance presets
7 7
LCD display
Yes Yes
LCD size
1.8" 3"
LCD resolution
134,000 461,000
Min. image resolution
640 x 480 320 x 240
Selftimer
Yes Yes
Storage types
CompactFlash type I, CompactFlash type II, Memory Stick, Memory SD, SDHC, MMC, MMCplus, HC MMCplus card
USB
USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
Batteries
AAA (2) batteries NiMH supplied Lithium-Ion NB-6L rechargeable battery & charger
Weight
832g 195g
Dimensions
134x91x156 mm 100x58x31 mm
Year
2003 2009



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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

Sony Cybershot DSC F828 diagonal

The diagonal of Sony Cybershot DSC F828 image sensor is not 2/3 inch as you might expect, but approximately two thirds of that value. If you want to know why, see sensor sizes.

w = 8.80 mm
h = 6.60 mm
Diagonal =  8.80² + 6.60²   = 11.00 mm

Canon PowerShot S90 diagonal

The diagonal of Canon PowerShot S90 image sensor is not 1/1.7 inch as you might expect, but approximately two thirds of that value. If you want to know why, see sensor sizes.

w = 7.53 mm
h = 5.64 mm
Diagonal =  7.53² + 5.64²   = 9.41 mm


Surface area

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

Sony Cybershot DSC F828 surface area

Width = 8.80 mm
Height = 6.60 mm

Surface area = 8.80 × 6.60 = 58.08 mm²

Canon PowerShot S90 surface area

Width = 7.53 mm
Height = 5.64 mm

Surface area = 7.53 × 5.64 = 42.47 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

Sony Cybershot DSC F828 pixel pitch

Sensor width = 8.80 mm
Sensor resolution width = 3262 pixels
Pixel pitch =   8.80  × 1000  = 2.7 µm
3262

Canon PowerShot S90 pixel pitch

Sensor width = 7.53 mm
Sensor resolution width = 3661 pixels
Pixel pitch =   7.53  × 1000  = 2.06 µm
3661


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

Sony Cybershot DSC F828 pixel area

Pixel pitch = 2.7 µm

Pixel area = 2.7² = 7.29 µm²

Canon PowerShot S90 pixel area

Pixel pitch = 2.06 µm

Pixel area = 2.06² = 4.24 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

You could also use this formula:
Pixel density =   effective megapixels × 1000000  / 10000
sensor surface area in mm²

Sony Cybershot DSC F828 pixel density

Sensor resolution width = 3262 pixels
Sensor width = 0.88 cm

Pixel density = (3262 / 0.88)² / 1000000 = 13.74 MP/cm²

Canon PowerShot S90 pixel density

Sensor resolution width = 3661 pixels
Sensor width = 0.753 cm

Pixel density = (3661 / 0.753)² / 1000000 = 23.64 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. 22.8 × 15.5 sensor for example has a ratio of 1.47.

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

Sony Cybershot DSC F828 sensor resolution

Sensor width = 8.80 mm
Sensor height = 6.60 mm
Effective megapixels = 8.00
r = 8.80/6.60 = 1.33
X =  8.00 × 1000000  = 2453
1.33
Resolution horizontal: X × r = 2453 × 1.33 = 3262
Resolution vertical: X = 2453

Sensor resolution = 3262 x 2453

Canon PowerShot S90 sensor resolution

Sensor width = 7.53 mm
Sensor height = 5.64 mm
Effective megapixels = 10.00
r = 7.53/5.64 = 1.34
X =  10.00 × 1000000  = 2732
1.34
Resolution horizontal: X × r = 2732 × 1.34 = 3661
Resolution vertical: X = 2732

Sensor resolution = 3661 x 2732


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


Sony Cybershot DSC F828 crop factor

Sensor diagonal in mm = 11.00 mm
Crop factor =   43.27  = 3.93
11.00

Canon PowerShot S90 crop factor

Sensor diagonal in mm = 9.41 mm
Crop factor =   43.27  = 4.6
9.41

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).

Sony Cybershot DSC 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

Canon PowerShot S90 equivalent aperture

Crop factor = 4.6
Aperture = f2.0 - f4.9

35-mm equivalent aperture = (f2.0 - f4.9) × 4.6 = f9.2 - f22.5


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