Sony Cyber-shot DSC-P100 vs. Sony Cyber-shot DSC-P51
Comparison
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Sony Cyber-shot DSC-P100 | Sony Cyber-shot DSC-P51 | ||||
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Megapixels
5.10
2.11
Max. image resolution
2592 x 1944
1600 x 1200
Sensor
Sensor type
CCD
CCD
Sensor size
1/1.8" (~ 7.11 x 5.33 mm)
1/2.7" (~ 5.33 x 4 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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1.78 | : | 1 |
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Sony Cyber-shot DSC-P100 | Sony Cyber-shot DSC-P51 |
Surface area:
37.90 mm² | vs | 21.32 mm² |
Difference: 16.58 mm² (78%)
P100 sensor is approx. 1.78x bigger than P51 sensor.
Note: You are comparing cameras of different generations.
There is a 2 year gap between Sony P100 (2004) and Sony P51 (2002).
All things being equal, newer sensor generations generally outperform the older.
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: 2.66 µm² (36%)
A pixel on Sony P51 sensor is approx. 36% bigger than a pixel on Sony P100.
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
Sony P100
Sony P51
Total megapixels
Effective megapixels
Optical zoom
3x
2x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100, 200, 400
Auto, 100, 200, 400
RAW
Manual focus
Normal focus range
50 cm
8 cm
Macro focus range
10 cm
8 cm
Focal length (35mm equiv.)
38 - 114 mm
41 - 82 mm
Aperture priority
Yes
No
Max. aperture
f2.8 - f5.2
f3.8
Metering
Matrix, Spot
Multi-segment, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
Yes
No
Min. shutter speed
30 sec
2 sec
Max. shutter speed
1/1000 sec
1/1000 sec
Built-in flash
External flash
Viewfinder
Optical (tunnel)
Optical (tunnel)
White balance presets
5
6
Screen size
1.5"
2"
Screen resolution
123,000 dots
61,000 dots
Video capture
Max. video resolution
Storage types
Memory Stick, Memory Stick Pro
Memory Stick
USB
USB 2.0 (480 Mbit/sec)
USB 1.0
HDMI
Wireless
GPS
Battery
InfoLithium (NP-FR1)
AA (2) batteries (NiMH rechargables included)
Weight
158 g
275 g
Dimensions
108 x 52 x 26 mm
127 x 58 x 47 mm
Year
2004
2002
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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 |
Sony P100 diagonal
The diagonal of P100 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
w = 7.11 mm
h = 5.33 mm
Diagonal = √ | 7.11² + 5.33² | = 8.89 mm |
Sony P51 diagonal
The diagonal of P51 sensor is not 1/2.7 or 0.37" (9.4 mm) as you might expect, but approximately two thirds of
that value - 6.66 mm. If you want to know why, see
sensor sizes.
w = 5.33 mm
h = 4.00 mm
w = 5.33 mm
h = 4.00 mm
Diagonal = √ | 5.33² + 4.00² | = 6.66 mm |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
P100 sensor area
Width = 7.11 mm
Height = 5.33 mm
Surface area = 7.11 × 5.33 = 37.90 mm²
Height = 5.33 mm
Surface area = 7.11 × 5.33 = 37.90 mm²
P51 sensor area
Width = 5.33 mm
Height = 4.00 mm
Surface area = 5.33 × 4.00 = 21.32 mm²
Height = 4.00 mm
Surface area = 5.33 × 4.00 = 21.32 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 |
P100 pixel pitch
Sensor width = 7.11 mm
Sensor resolution width = 2604 pixels
Sensor resolution width = 2604 pixels
Pixel pitch = | 7.11 | × 1000 | = 2.73 µm |
2604 |
P51 pixel pitch
Sensor width = 5.33 mm
Sensor resolution width = 1676 pixels
Sensor resolution width = 1676 pixels
Pixel pitch = | 5.33 | × 1000 | = 3.18 µm |
1676 |
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 |
P100 pixel area
Pixel pitch = 2.73 µm
Pixel area = 2.73² = 7.45 µm²
Pixel area = 2.73² = 7.45 µm²
P51 pixel area
Pixel pitch = 3.18 µm
Pixel area = 3.18² = 10.11 µm²
Pixel area = 3.18² = 10.11 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 |
P100 pixel density
Sensor resolution width = 2604 pixels
Sensor width = 0.711 cm
Pixel density = (2604 / 0.711)² / 1000000 = 13.41 MP/cm²
Sensor width = 0.711 cm
Pixel density = (2604 / 0.711)² / 1000000 = 13.41 MP/cm²
P51 pixel density
Sensor resolution width = 1676 pixels
Sensor width = 0.533 cm
Pixel density = (1676 / 0.533)² / 1000000 = 9.89 MP/cm²
Sensor width = 0.533 cm
Pixel density = (1676 / 0.533)² / 1000000 = 9.89 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
P100 sensor resolution
Sensor width = 7.11 mm
Sensor height = 5.33 mm
Effective megapixels = 5.10
Resolution horizontal: X × r = 1958 × 1.33 = 2604
Resolution vertical: X = 1958
Sensor resolution = 2604 x 1958
Sensor height = 5.33 mm
Effective megapixels = 5.10
r = 7.11/5.33 = 1.33 |
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Resolution vertical: X = 1958
Sensor resolution = 2604 x 1958
P51 sensor resolution
Sensor width = 5.33 mm
Sensor height = 4.00 mm
Effective megapixels = 2.11
Resolution horizontal: X × r = 1260 × 1.33 = 1676
Resolution vertical: X = 1260
Sensor resolution = 1676 x 1260
Sensor height = 4.00 mm
Effective megapixels = 2.11
r = 5.33/4.00 = 1.33 |
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Resolution vertical: X = 1260
Sensor resolution = 1676 x 1260
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 |
P100 crop factor
Sensor diagonal in mm = 8.89 mm
Crop factor = | 43.27 | = 4.87 |
8.89 |
P51 crop factor
Sensor diagonal in mm = 6.66 mm
Crop factor = | 43.27 | = 6.5 |
6.66 |
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).
P100 equivalent aperture
Crop factor = 4.87
Aperture = f2.8 - f5.2
35-mm equivalent aperture = (f2.8 - f5.2) × 4.87 = f13.6 - f25.3
Aperture = f2.8 - f5.2
35-mm equivalent aperture = (f2.8 - f5.2) × 4.87 = f13.6 - f25.3
P51 equivalent aperture
Crop factor = 6.5
Aperture = f3.8
35-mm equivalent aperture = (f3.8) × 6.5 = f24.7
Aperture = f3.8
35-mm equivalent aperture = (f3.8) × 6.5 = f24.7
More comparisons of Sony P100:
- Sony Cyber-shot DSC-P100 vs. Fujifilm FinePix F40fd
- Sony Cyber-shot DSC-P100 vs. Sony Cyber-shot DSC-P51
- Sony Cyber-shot DSC-P100 vs. Nikon Coolpix S3300
- Sony Cyber-shot DSC-P100 vs. Sony Cyber-shot DSC-P12
- Sony Cyber-shot DSC-P100 vs. Sony Cyber-shot DSC-V1
- Sony Cyber-shot DSC-P100 vs. Fujifilm X10
- Sony Cyber-shot DSC-P100 vs. Nikon Coolpix P60
- Sony Cyber-shot DSC-P100 vs. Canon PowerShot SX710 HS
- Sony Cyber-shot DSC-P100 vs. Sony Cyber-shot DSC-V3
- Sony Cyber-shot DSC-P100 vs. Sony Cyber-shot DSC-P72
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