Toshiba PDR 2300 vs. Panasonic Lumix DMC-ZS25
Comparison
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| Toshiba PDR 2300 | Panasonic Lumix DMC-ZS25 | ||||
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Megapixels
2.00
16.10
Max. image resolution
1600 x 1200
4608 x 3456
Sensor
Sensor type
CCD
CMOS
Sensor size
1/2.7" (~ 5.33 x 4 mm)
1/2.33" (~ 6.08 x 4.56 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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| Toshiba PDR 2300 | Panasonic Lumix DMC-ZS25 | |
Surface area:
| 21.32 mm² | vs | 27.72 mm² |
Difference: 6.4 mm² (30%)
ZS25 sensor is approx. 1.3x bigger than PDR 2300 sensor.
Note: You are comparing sensors of vastly different generations.
There is a gap of 11 years between Toshiba PDR 2300 (2002) and
Panasonic ZS25 (2013).
Eleven years is a huge amount of time,
technology wise, resulting in newer sensor being much more
efficient than the older one.
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: 8.97 µm² (522%)
A pixel on Toshiba PDR 2300 sensor is approx. 522% bigger than a pixel on Panasonic ZS25.
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
Toshiba PDR 2300
Panasonic ZS25
Total megapixels
17.50
Effective megapixels
16.10
Optical zoom
Yes
20x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100, 200, 400
Auto, 100, 200, 400, 800, 1600. 3200, 6400
RAW
Manual focus
Normal focus range
50 cm
50 cm
Macro focus range
20 cm
3 cm
Focal length (35mm equiv.)
36 - 108 mm
24 - 480 mm
Aperture priority
No
Yes
Max. aperture
f2.8 - f4.4
f3.3 - f6.4
Metering
Matrix
Multi, Center-weighted, Spot
Exposure compensation
±1.8 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
Yes
Min. shutter speed
1/3 sec
15 sec
Max. shutter speed
1/1000 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
Optical
None
White balance presets
5
4
Screen size
1.6"
3"
Screen resolution
60,000 dots
460,000 dots
Video capture
Max. video resolution
Storage types
Secure Digital
SD/SDHC/SDXC
USB
USB 1.1
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
4x AA
Lithium-Ion rechargeable battery
Weight
310 g
193 g
Dimensions
110 x 68 x 51 mm
104.9 x 58.9 x 28.7 mm
Year
2002
2013
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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 |
Toshiba PDR 2300 diagonal
The diagonal of PDR 2300 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 |
Panasonic ZS25 diagonal
The diagonal of ZS25 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 |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
PDR 2300 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
ZS25 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
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 |
PDR 2300 pixel pitch
Sensor width = 5.33 mm
Sensor resolution width = 1631 pixels
Sensor resolution width = 1631 pixels
| Pixel pitch = | 5.33 | × 1000 | = 3.27 µm |
| 1631 |
ZS25 pixel pitch
Sensor width = 6.08 mm
Sensor resolution width = 4627 pixels
Sensor resolution width = 4627 pixels
| Pixel pitch = | 6.08 | × 1000 | = 1.31 µm |
| 4627 |
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 |
PDR 2300 pixel area
Pixel pitch = 3.27 µm
Pixel area = 3.27² = 10.69 µm²
Pixel area = 3.27² = 10.69 µm²
ZS25 pixel area
Pixel pitch = 1.31 µm
Pixel area = 1.31² = 1.72 µm²
Pixel area = 1.31² = 1.72 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 |
PDR 2300 pixel density
Sensor resolution width = 1631 pixels
Sensor width = 0.533 cm
Pixel density = (1631 / 0.533)² / 1000000 = 9.36 MP/cm²
Sensor width = 0.533 cm
Pixel density = (1631 / 0.533)² / 1000000 = 9.36 MP/cm²
ZS25 pixel density
Sensor resolution width = 4627 pixels
Sensor width = 0.608 cm
Pixel density = (4627 / 0.608)² / 1000000 = 57.92 MP/cm²
Sensor width = 0.608 cm
Pixel density = (4627 / 0.608)² / 1000000 = 57.92 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
PDR 2300 sensor resolution
Sensor width = 5.33 mm
Sensor height = 4.00 mm
Effective megapixels = 2.00
Resolution horizontal: X × r = 1226 × 1.33 = 1631
Resolution vertical: X = 1226
Sensor resolution = 1631 x 1226
Sensor height = 4.00 mm
Effective megapixels = 2.00
| r = 5.33/4.00 = 1.33 |
|
Resolution vertical: X = 1226
Sensor resolution = 1631 x 1226
ZS25 sensor resolution
Sensor width = 6.08 mm
Sensor height = 4.56 mm
Effective megapixels = 16.10
Resolution horizontal: X × r = 3479 × 1.33 = 4627
Resolution vertical: X = 3479
Sensor resolution = 4627 x 3479
Sensor height = 4.56 mm
Effective megapixels = 16.10
| r = 6.08/4.56 = 1.33 |
|
Resolution vertical: X = 3479
Sensor resolution = 4627 x 3479
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 |
PDR 2300 crop factor
Sensor diagonal in mm = 6.66 mm
| Crop factor = | 43.27 | = 6.5 |
| 6.66 |
ZS25 crop factor
Sensor diagonal in mm = 7.60 mm
| Crop factor = | 43.27 | = 5.69 |
| 7.60 |
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).
PDR 2300 equivalent aperture
Crop factor = 6.5
Aperture = f2.8 - f4.4
35-mm equivalent aperture = (f2.8 - f4.4) × 6.5 = f18.2 - f28.6
Aperture = f2.8 - f4.4
35-mm equivalent aperture = (f2.8 - f4.4) × 6.5 = f18.2 - f28.6
ZS25 equivalent aperture
Crop factor = 5.69
Aperture = f3.3 - f6.4
35-mm equivalent aperture = (f3.3 - f6.4) × 5.69 = f18.8 - f36.4
Aperture = f3.3 - f6.4
35-mm equivalent aperture = (f3.3 - f6.4) × 5.69 = f18.8 - f36.4
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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.