Sanyo Xacti VPC-S650 vs. Sony Cyber-shot DSC-S950

Comparison

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Xacti VPC-S650 image
vs
Cyber-shot DSC-S950 image
Sanyo Xacti VPC-S650 Sony Cyber-shot DSC-S950
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Megapixels
6.00
10.10
Max. image resolution
2816 x 2112
4000 x 3000

Sensor

Sensor type
CCD
CCD
Sensor size
1/2.5" (~ 5.75 x 4.32 mm)
1/2.3" (~ 6.16 x 4.62 mm)
Sensor resolution
2825 x 2124
3665 x 2756
Diagonal
7.19 mm
7.70 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 : 1.15
(ratio)
Sanyo Xacti VPC-S650 Sony Cyber-shot DSC-S950
Surface area:
24.84 mm² vs 28.46 mm²
Difference: 3.62 mm² (15%)
S950 sensor is approx. 1.15x bigger than VPC-S650 sensor.
Note: You are comparing cameras of different generations. There is a 2 year gap between Sanyo VPC-S650 (2007) and Sony S950 (2009). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
2.04 µm
1.68 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: 0.36 µm (21%)
Pixel pitch of VPC-S650 is approx. 21% higher than pixel pitch of S950.
Pixel area
4.16 µm²
2.82 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:
vs
Pixel area difference: 1.34 µm² (48%)
A pixel on Sanyo VPC-S650 sensor is approx. 48% bigger than a pixel on Sony S950.
Pixel density
24.14 MP/cm²
35.4 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: 11.26 µm (47%)
Sony S950 has approx. 47% higher pixel density than Sanyo VPC-S650.
To learn about the accuracy of these numbers, click here.



Specs

Sanyo VPC-S650
Sony S950
Crop factor
6.02
5.62
Total megapixels
Effective megapixels
Optical zoom
Yes
4x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 80, 100, 200, 400, 800
Auto, 100 - 3200
RAW
Manual focus
Normal focus range
50 cm
50 cm
Macro focus range
10 cm
10 cm
Focal length (35mm equiv.)
35 - 106 mm
33 - 132 mm
Aperture priority
No
No
Max. aperture
f2.8 - f4.9
f2.5 - f5.6
Max. aperture (35mm equiv.)
f16.9 - f29.5
f14.1 - f31.5
Metering
Centre weighted
Centre weighted
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
No
Min. shutter speed
8 sec
2 sec
Max. shutter speed
1/1500 sec
1/1600 sec
Built-in flash
External flash
Viewfinder
None
None
White balance presets
8
Screen size
2.4"
2.7"
Screen resolution
230,000 dots
Video capture
Max. video resolution
Storage types
SDHC, Secure Digital
Memory Stick Duo, Memory Stick Pro Duo
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Li-Ion
Lithium-Ion Battery
Weight
122 g
167 g
Dimensions
92.7 x 60.9 x 22.6 mm
93 x 56 x 24 mm
Year
2007
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

Sanyo VPC-S650 diagonal

The diagonal of VPC-S650 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

Sony S950 diagonal

The diagonal of S950 sensor is not 1/2.3 or 0.43" (11 mm) as you might expect, but approximately two thirds of that value - 7.7 mm. If you want to know why, see sensor sizes.

w = 6.16 mm
h = 4.62 mm
Diagonal = √  6.16² + 4.62²   = 7.70 mm


Surface area

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

VPC-S650 sensor area

Width = 5.75 mm
Height = 4.32 mm

Surface area = 5.75 × 4.32 = 24.84 mm²

S950 sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 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

VPC-S650 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 2825 pixels
Pixel pitch =   5.75  × 1000  = 2.04 µm
2825

S950 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 3665 pixels
Pixel pitch =   6.16  × 1000  = 1.68 µm
3665


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

VPC-S650 pixel area

Pixel pitch = 2.04 µm

Pixel area = 2.04² = 4.16 µm²

S950 pixel area

Pixel pitch = 1.68 µm

Pixel area = 1.68² = 2.82 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

VPC-S650 pixel density

Sensor resolution width = 2825 pixels
Sensor width = 0.575 cm

Pixel density = (2825 / 0.575)² / 1000000 = 24.14 MP/cm²

S950 pixel density

Sensor resolution width = 3665 pixels
Sensor width = 0.616 cm

Pixel density = (3665 / 0.616)² / 1000000 = 35.4 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

VPC-S650 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 6.00
r = 5.75/4.32 = 1.33
X = √  6.00 × 1000000  = 2124
1.33
Resolution horizontal: X × r = 2124 × 1.33 = 2825
Resolution vertical: X = 2124

Sensor resolution = 2825 x 2124

S950 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 10.10
r = 6.16/4.62 = 1.33
X = √  10.10 × 1000000  = 2756
1.33
Resolution horizontal: X × r = 2756 × 1.33 = 3665
Resolution vertical: X = 2756

Sensor resolution = 3665 x 2756


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


VPC-S650 crop factor

Sensor diagonal in mm = 7.19 mm
Crop factor =   43.27  = 6.02
7.19

S950 crop factor

Sensor diagonal in mm = 7.70 mm
Crop factor =   43.27  = 5.62
7.70

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).

VPC-S650 equivalent aperture

Crop factor = 6.02
Aperture = f2.8 - f4.9

35-mm equivalent aperture = (f2.8 - f4.9) × 6.02 = f16.9 - f29.5

S950 equivalent aperture

Crop factor = 5.62
Aperture = f2.5 - f5.6

35-mm equivalent aperture = (f2.5 - f5.6) × 5.62 = f14.1 - f31.5

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