Sony Cyber-shot DSC-T900 vs. Sony Cyber-shot DSC-T200

Comparison

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Cyber-shot DSC-T900 image
vs
Cyber-shot DSC-T200 image
Sony Cyber-shot DSC-T900 Sony Cyber-shot DSC-T200
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Megapixels
12.40
8.10
Max. image resolution
4000 x 3000
3264 x 2448

Sensor

Sensor type
CCD
CCD
Sensor size
1/2.3" (~ 6.16 x 4.62 mm)
1/2.5" (~ 5.75 x 4.32 mm)
Sensor resolution
4060 x 3053
3282 x 2468
Diagonal
7.70 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
1.15 : 1
(ratio)
Sony Cyber-shot DSC-T900 Sony Cyber-shot DSC-T200
Surface area:
28.46 mm² vs 24.84 mm²
Difference: 3.62 mm² (15%)
T900 sensor is approx. 1.15x bigger than T200 sensor.
Note: You are comparing cameras of different generations. There is a 2 year gap between Sony T900 (2009) and Sony T200 (2007). All things being equal, newer sensor generations generally outperform the older.
Pixel pitch
1.52 µm
1.75 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: 0.23 µm (15%)
Pixel pitch of T200 is approx. 15% higher than pixel pitch of T900.
Pixel area
2.31 µm²
3.06 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: 0.75 µm² (32%)
A pixel on Sony T200 sensor is approx. 32% bigger than a pixel on Sony T900.
Pixel density
43.44 MP/cm²
32.58 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: 10.86 µm (33%)
Sony T900 has approx. 33% higher pixel density than Sony T200.
To learn about the accuracy of these numbers, click here.



Specs

Sony T900
Sony T200
Crop factor
5.62
6.02
Total megapixels
Effective megapixels
Optical zoom
4x
5x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 80, 100, 200, 400, 800, 1600, 3200
Auto, 3200
RAW
Manual focus
Normal focus range
8 cm
50 cm
Macro focus range
8 cm
1 cm
Focal length (35mm equiv.)
35 - 140 mm
35 - 175 mm
Aperture priority
No
No
Max. aperture
f3.5 - f4.6
f3.5 - f4.4
Max. aperture (35mm equiv.)
f19.7 - f25.9
f21.1 - f26.5
Metering
Centre weighted, Multi-segment, Spot
Multi, Center-weighted, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
No
Min. shutter speed
2 sec
1 sec
Max. shutter speed
1/1600 sec
1/1000 sec
Built-in flash
External flash
Viewfinder
None
None
White balance presets
6
7
Screen size
3.5"
3.5"
Screen resolution
921,600 dots
230,000 dots
Video capture
Max. video resolution
Storage types
Memory Stick Duo, Memory Stick Pro Duo
Memory Stick Duo, Memory Stick Pro Duo
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion Battery
InfoLithium (NP-BD1)
Weight
123 g
160 g
Dimensions
94 x 57 x 16 mm
94 x 59 x 20 mm
Year
2009
2007




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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 T900 diagonal

The diagonal of T900 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

Sony T200 diagonal

The diagonal of T200 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.

T900 sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

T200 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

T900 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4060 pixels
Pixel pitch =   6.16  × 1000  = 1.52 µm
4060

T200 pixel pitch

Sensor width = 5.75 mm
Sensor resolution width = 3282 pixels
Pixel pitch =   5.75  × 1000  = 1.75 µm
3282


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

T900 pixel area

Pixel pitch = 1.52 µm

Pixel area = 1.52² = 2.31 µm²

T200 pixel area

Pixel pitch = 1.75 µm

Pixel area = 1.75² = 3.06 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

T900 pixel density

Sensor resolution width = 4060 pixels
Sensor width = 0.616 cm

Pixel density = (4060 / 0.616)² / 1000000 = 43.44 MP/cm²

T200 pixel density

Sensor resolution width = 3282 pixels
Sensor width = 0.575 cm

Pixel density = (3282 / 0.575)² / 1000000 = 32.58 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

T900 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 12.40
r = 6.16/4.62 = 1.33
X =  12.40 × 1000000  = 3053
1.33
Resolution horizontal: X × r = 3053 × 1.33 = 4060
Resolution vertical: X = 3053

Sensor resolution = 4060 x 3053

T200 sensor resolution

Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 8.10
r = 5.75/4.32 = 1.33
X =  8.10 × 1000000  = 2468
1.33
Resolution horizontal: X × r = 2468 × 1.33 = 3282
Resolution vertical: X = 2468

Sensor resolution = 3282 x 2468


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


T900 crop factor

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

T200 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).

T900 equivalent aperture

Crop factor = 5.62
Aperture = f3.5 - f4.6

35-mm equivalent aperture = (f3.5 - f4.6) × 5.62 = f19.7 - f25.9

T200 equivalent aperture

Crop factor = 6.02
Aperture = f3.5 - f4.4

35-mm equivalent aperture = (f3.5 - f4.4) × 6.02 = f21.1 - f26.5

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