Pentax Optio VS20 vs. Sony Cyber-shot DSC-T10
Comparison
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| Pentax Optio VS20 | Sony Cyber-shot DSC-T10 | ||||
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Megapixels
16.00
7.40
Max. image resolution
4608 x 3456
3072 x 2304
Sensor
Sensor type
CCD
CCD
Sensor size
1/2.33" (~ 6.08 x 4.56 mm)
1/2.5" (~ 5.75 x 4.32 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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| Pentax Optio VS20 | Sony Cyber-shot DSC-T10 | |
Surface area:
| 27.72 mm² | vs | 24.84 mm² |
Difference: 2.88 mm² (12%)
VS20 sensor is approx. 1.12x bigger than T10 sensor.
Note: You are comparing sensors of very different generations.
There is a gap of 6 years between Pentax VS20 (2012) and Sony T10 (2006).
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 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: 1.61 µm² (93%)
A pixel on Sony T10 sensor is approx. 93% bigger than a pixel on Pentax VS20.
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
Pentax VS20
Sony T10
Total megapixels
16.60
Effective megapixels
16.00
Optical zoom
20x
3x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100, 200, 400,800, 1600, 3200, 6400
Auto, 80, 100, 200, 400, 800, 1000
RAW
Manual focus
Normal focus range
40 cm
50 cm
Macro focus range
3 cm
1 cm
Focal length (35mm equiv.)
28 - 560 mm
38 - 114 mm
Aperture priority
No
No
Max. aperture
f3.1 - f4.8
f3.5 - f5.6
Metering
Centre weighted, Multi-segment, Spot
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
4 sec
1 sec
Max. shutter speed
1/2500 sec
1/1000 sec
Built-in flash
External flash
Viewfinder
None
None
White balance presets
7
5
Screen size
3"
2.5"
Screen resolution
460,000 dots
230,000 dots
Video capture
Max. video resolution
Storage types
SDHC, SDXC, 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
Lithium-Ion D-LI122 rechargeable battery
InfoLithium (NP-FT1)
Weight
235 g
140 g
Dimensions
111 x 61 x 38 mm
89.7 x 54.9 x 20.6 mm
Year
2012
2006
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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 |
Pentax VS20 diagonal
The diagonal of VS20 sensor is not 1/2.33 or 0.43" (10.9 mm) as you might expect, but approximately two thirds of
that value - 7.6 mm. If you want to know why, see
sensor sizes.
w = 6.08 mm
h = 4.56 mm
w = 6.08 mm
h = 4.56 mm
| Diagonal = √ | 6.08² + 4.56² | = 7.60 mm |
Sony T10 diagonal
The diagonal of T10 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 |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
VS20 sensor area
Width = 6.08 mm
Height = 4.56 mm
Surface area = 6.08 × 4.56 = 27.72 mm²
Height = 4.56 mm
Surface area = 6.08 × 4.56 = 27.72 mm²
T10 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
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 |
VS20 pixel pitch
Sensor width = 6.08 mm
Sensor resolution width = 4612 pixels
Sensor resolution width = 4612 pixels
| Pixel pitch = | 6.08 | × 1000 | = 1.32 µm |
| 4612 |
T10 pixel pitch
Sensor width = 5.75 mm
Sensor resolution width = 3137 pixels
Sensor resolution width = 3137 pixels
| Pixel pitch = | 5.75 | × 1000 | = 1.83 µm |
| 3137 |
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 |
VS20 pixel area
Pixel pitch = 1.32 µm
Pixel area = 1.32² = 1.74 µm²
Pixel area = 1.32² = 1.74 µm²
T10 pixel area
Pixel pitch = 1.83 µm
Pixel area = 1.83² = 3.35 µm²
Pixel area = 1.83² = 3.35 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 |
VS20 pixel density
Sensor resolution width = 4612 pixels
Sensor width = 0.608 cm
Pixel density = (4612 / 0.608)² / 1000000 = 57.54 MP/cm²
Sensor width = 0.608 cm
Pixel density = (4612 / 0.608)² / 1000000 = 57.54 MP/cm²
T10 pixel density
Sensor resolution width = 3137 pixels
Sensor width = 0.575 cm
Pixel density = (3137 / 0.575)² / 1000000 = 29.76 MP/cm²
Sensor width = 0.575 cm
Pixel density = (3137 / 0.575)² / 1000000 = 29.76 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 → |
|
Resolution horizontal: X × r
Resolution vertical: X
VS20 sensor resolution
Sensor width = 6.08 mm
Sensor height = 4.56 mm
Effective megapixels = 16.00
Resolution horizontal: X × r = 3468 × 1.33 = 4612
Resolution vertical: X = 3468
Sensor resolution = 4612 x 3468
Sensor height = 4.56 mm
Effective megapixels = 16.00
| r = 6.08/4.56 = 1.33 |
|
Resolution vertical: X = 3468
Sensor resolution = 4612 x 3468
T10 sensor resolution
Sensor width = 5.75 mm
Sensor height = 4.32 mm
Effective megapixels = 7.40
Resolution horizontal: X × r = 2359 × 1.33 = 3137
Resolution vertical: X = 2359
Sensor resolution = 3137 x 2359
Sensor height = 4.32 mm
Effective megapixels = 7.40
| r = 5.75/4.32 = 1.33 |
|
Resolution vertical: X = 2359
Sensor resolution = 3137 x 2359
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 |
VS20 crop factor
Sensor diagonal in mm = 7.60 mm
| Crop factor = | 43.27 | = 5.69 |
| 7.60 |
T10 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).
VS20 equivalent aperture
Crop factor = 5.69
Aperture = f3.1 - f4.8
35-mm equivalent aperture = (f3.1 - f4.8) × 5.69 = f17.6 - f27.3
Aperture = f3.1 - f4.8
35-mm equivalent aperture = (f3.1 - f4.8) × 5.69 = f17.6 - f27.3
T10 equivalent aperture
Crop factor = 6.02
Aperture = f3.5 - f5.6
35-mm equivalent aperture = (f3.5 - f5.6) × 6.02 = f21.1 - f33.7
Aperture = f3.5 - f5.6
35-mm equivalent aperture = (f3.5 - f5.6) × 6.02 = f21.1 - f33.7
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If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a sensor won't be shown correctly.