Sony Cyber-shot DSC-W150 vs. Sony Alpha DSLR-A850
Comparison
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Sony Cyber-shot DSC-W150 | Sony Alpha DSLR-A850 | ||||
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Megapixels
8.10
24.60
Max. image resolution
3264 x 2448
6048 x 4032
Sensor
Sensor type
CCD
CMOS
Sensor size
1/2.5" (~ 5.75 x 4.32 mm)
35.9 x 24 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 | : | 34.69 |
(ratio) | ||
Sony Cyber-shot DSC-W150 | Sony Alpha DSLR-A850 |
Surface area:
24.84 mm² | vs | 861.60 mm² |
Difference: 836.76 mm² (3369%)
Alpha DSLR-A850 sensor is approx. 34.69x bigger than W150 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: 31.87 µm² (1042%)
A pixel on Sony Alpha DSLR-A850 sensor is approx. 1042% bigger than a pixel on Sony W150.
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 W150
Sony Alpha DSLR-A850
Total megapixels
25.70
Effective megapixels
24.60
Optical zoom
5x
Digital zoom
Yes
No
ISO sensitivity
Auto
Auto, 200, 400, 800, 1600, 3200 (6400 with boost)
RAW
Manual focus
Normal focus range
10 cm
Macro focus range
10 cm
Focal length (35mm equiv.)
30 - 150 mm
Aperture priority
No
Yes
Max. aperture
f3.3 - f5.2
Metering
Multi, Center-weighted, Spot
Multi, Center-weighted, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±3 EV (in 1/3 EV steps)
Shutter priority
No
Yes
Min. shutter speed
1 sec
30 sec
Max. shutter speed
1/1600 sec
1/8000 sec
Built-in flash
External flash
Viewfinder
Optical (tunnel)
Optical (pentaprism)
White balance presets
9
7
Screen size
2.5"
3"
Screen resolution
230,000 dots
921,600 dots
Video capture
Max. video resolution
Storage types
Memory Stick Duo, Memory Stick Pro Duo
Compact Flash (Type I or II), UDMA, Memory Stick Duo / Pro Duo
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion (NP-BG1)
Lithium-Ion NP-FM500H rechargeable battery
Weight
173 g
895 g
Dimensions
94 x 58 x 24 mm
156 x 117 x 82 mm
Year
2008
2009
Choose cameras to compare
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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 W150 diagonal
The diagonal of W150 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 Alpha DSLR-A850 diagonal
w = 35.90 mm
h = 24.00 mm
h = 24.00 mm
Diagonal = √ | 35.90² + 24.00² | = 43.18 mm |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
W150 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
Alpha DSLR-A850 sensor area
Width = 35.90 mm
Height = 24.00 mm
Surface area = 35.90 × 24.00 = 861.60 mm²
Height = 24.00 mm
Surface area = 35.90 × 24.00 = 861.60 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 |
W150 pixel pitch
Sensor width = 5.75 mm
Sensor resolution width = 3282 pixels
Sensor resolution width = 3282 pixels
Pixel pitch = | 5.75 | × 1000 | = 1.75 µm |
3282 |
Alpha DSLR-A850 pixel pitch
Sensor width = 35.90 mm
Sensor resolution width = 6075 pixels
Sensor resolution width = 6075 pixels
Pixel pitch = | 35.90 | × 1000 | = 5.91 µm |
6075 |
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 |
W150 pixel area
Pixel pitch = 1.75 µm
Pixel area = 1.75² = 3.06 µm²
Pixel area = 1.75² = 3.06 µm²
Alpha DSLR-A850 pixel area
Pixel pitch = 5.91 µm
Pixel area = 5.91² = 34.93 µm²
Pixel area = 5.91² = 34.93 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 |
W150 pixel density
Sensor resolution width = 3282 pixels
Sensor width = 0.575 cm
Pixel density = (3282 / 0.575)² / 1000000 = 32.58 MP/cm²
Sensor width = 0.575 cm
Pixel density = (3282 / 0.575)² / 1000000 = 32.58 MP/cm²
Alpha DSLR-A850 pixel density
Sensor resolution width = 6075 pixels
Sensor width = 3.59 cm
Pixel density = (6075 / 3.59)² / 1000000 = 2.86 MP/cm²
Sensor width = 3.59 cm
Pixel density = (6075 / 3.59)² / 1000000 = 2.86 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
W150 sensor resolution
Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 8.10
Resolution horizontal: X × r = 2468 × 1.33 = 3282
Resolution vertical: X = 2468
Sensor resolution = 3282 x 2468
Sensor height = 4.32 mm
Effective megapixels = 8.10
r = 5.75/4.32 = 1.33 |
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Resolution vertical: X = 2468
Sensor resolution = 3282 x 2468
Alpha DSLR-A850 sensor resolution
Sensor width = 35.90 mm
Sensor height = 24.00 mm
Effective megapixels = 24.60
Resolution horizontal: X × r = 4050 × 1.5 = 6075
Resolution vertical: X = 4050
Sensor resolution = 6075 x 4050
Sensor height = 24.00 mm
Effective megapixels = 24.60
r = 35.90/24.00 = 1.5 |
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Resolution vertical: X = 4050
Sensor resolution = 6075 x 4050
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 |
W150 crop factor
Sensor diagonal in mm = 7.19 mm
Crop factor = | 43.27 | = 6.02 |
7.19 |
Alpha DSLR-A850 crop factor
Sensor diagonal in mm = 43.18 mm
Crop factor = | 43.27 | = 1 |
43.18 |
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).
W150 equivalent aperture
Crop factor = 6.02
Aperture = f3.3 - f5.2
35-mm equivalent aperture = (f3.3 - f5.2) × 6.02 = f19.9 - f31.3
Aperture = f3.3 - f5.2
35-mm equivalent aperture = (f3.3 - f5.2) × 6.02 = f19.9 - f31.3
Alpha DSLR-A850 equivalent aperture
Aperture is a lens characteristic, so it's calculated only for
fixed lens cameras. If you want to know the equivalent aperture for
Sony Alpha DSLR-A850, take the aperture of the lens
you're using and multiply it with crop factor.
Since crop factor for Sony Alpha DSLR-A850 is 1, the equivalent aperture is aperture.
Since crop factor for Sony Alpha DSLR-A850 is 1, the equivalent aperture is aperture.
More comparisons of Sony W150:
- Sony Cyber-shot DSC-W150 vs. Nikon Coolpix L310
- Sony Cyber-shot DSC-W150 vs. Panasonic Lumix DMC-ZS30
- Sony Cyber-shot DSC-W150 vs. Nikon Coolpix S710
- Sony Cyber-shot DSC-W150 vs. Nikon Coolpix AW120
- Sony Cyber-shot DSC-W150 vs. Sony Cyber-shot DSC-W800
- Sony Cyber-shot DSC-W150 vs. Nikon Coolpix L16
- Sony Cyber-shot DSC-W150 vs. Sony Alpha DSLR-A850
- Sony Cyber-shot DSC-W150 vs. Canon PowerShot G9
- Sony Cyber-shot DSC-W150 vs. Canon PowerShot A2300
- Sony Cyber-shot DSC-W150 vs. Panasonic Lumix DMC-TZ10
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