Praktica DCZ 12.1
Specs
| Brand: | Praktica |
| Model: | DCZ 12.1 |
| Megapixels: | 12.00 |
| Sensor: | 1/2.3" (~ 6.16 x 4.62 mm) |
| Price: | check here » |
Sensor info
Praktica DCZ 12.1 comes with a
1/2.3" (~ 6.16 x 4.62 mm) CCD sensor, which has a diagonal of
7.70 mm (0.3") and a surface area of
28.46 mm².
If you want to know about the accuracy of these numbers,
click here.
Actual sensor size
Note: Actual size is set to screen → change »
This is the actual size of the DCZ 12.1 sensor: ~6.16 x 4.62 mm
The sensor has a surface area of 28.5 mm².
There are approx. 12,000,000 photosites (pixels) on this area.
Pixel pitch, which is a measure of the distance between pixels, is 1.54 µm.
Pixel pitch tells you the distance from the center of one pixel (photosite) to the center of the next.
Pixel or photosite area is 2.37 µm². The larger the photosite, the more light it can capture and the more information can be recorded.
Pixel density tells you how many million pixels fit or would fit in one square cm of the sensor. Praktica DCZ 12.1 has a pixel density of 42.06 MP/cm².
These numbers are important in terms of assessing the overall quality of a digital camera. Generally, the bigger (and newer) the sensor, pixel pitch and photosite area, and the smaller the pixel density, the better the camera. If you want to see how DCZ 12.1 compares to other cameras, click here.
Pixel or photosite area is 2.37 µm². The larger the photosite, the more light it can capture and the more information can be recorded.
Pixel density tells you how many million pixels fit or would fit in one square cm of the sensor. Praktica DCZ 12.1 has a pixel density of 42.06 MP/cm².
These numbers are important in terms of assessing the overall quality of a digital camera. Generally, the bigger (and newer) the sensor, pixel pitch and photosite area, and the smaller the pixel density, the better the camera. If you want to see how DCZ 12.1 compares to other cameras, click here.
Specifications
| Brand: | Praktica |
| Model: | DCZ 12.1 |
| Megapixels: | 12.00 |
| Sensor size: | 1/2.3" (~ 6.16 x 4.62 mm) |
| Sensor type: | CCD |
| Sensor resolution: | 3995 x 3004 |
| Max. image resolution: | 4000 x 3000 |
| Crop factor: | 5.62 |
| Optical zoom: | Yes |
| Digital zoom: | Yes |
| ISO: | Auto, 50, 100, 200, 400, 800, 1600, 3200, 6400 |
| RAW support: | |
| Manual focus: | |
| Normal focus range: | 40 cm |
| Macro focus range: | 10 cm |
| Focal length (35mm equiv.): | 38 - 113 mm |
| Aperture priority: | No |
| Max aperture: | f3.0 - f5.6 |
| Max. aperture (35mm equiv.): | f16.9 - f31.5 |
| Depth of field: | simulate → |
| Metering: | Centre weighted, Multi Spot, Spot |
| Exposure Compensation: | ±2 EV (in 1/3 EV steps) |
| Shutter priority: | No |
| Min. shutter speed: | 8 sec |
| Max. shutter speed: | 1/2000 sec |
| Built-in flash: | |
| External flash: | |
| Viewfinder: | None |
| White balance presets: | 6 |
| Screen size: | 2.7" |
| Screen resolution: | 230,400 dots |
| Video capture: | |
| Storage types: | SDHC, Secure Digital |
| USB: | USB 2.0 (480 Mbit/sec) |
| HDMI: | |
| Wireless: | |
| GPS: | |
| Battery: | 2x AA |
| Weight: | 120 g |
| Dimensions: | 92 x 61 x 25 mm |
| Year: | 2009 |
Compare DCZ 12.1 with another camera
Popular comparisons:
- Praktica DCZ 12.1 vs. Praktica DCZ 12.Z4
- Praktica DCZ 12.1 vs. Nikon Coolpix 2200
- Praktica DCZ 12.1 vs. Panasonic Lumix DMC-TZ30
- Praktica DCZ 12.1 vs. Olympus D-620L
- Praktica DCZ 12.1 vs. Canon PowerShot SX170 IS
- Praktica DCZ 12.1 vs. Olympus SP 550 UZ
- Praktica DCZ 12.1 vs. Canon PowerShot A1200
- Praktica DCZ 12.1 vs. Casio Exilim EX-Z800
- Praktica DCZ 12.1 vs. Nikon Coolpix 2500
- Praktica DCZ 12.1 vs. Panasonic Lumix DMC-TZ80
- Praktica DCZ 12.1 vs. Panasonic Lumix DC-FT7
Diagonal
The diagonal of DCZ 12.1 sensor is not 1/2.3 or 0.43" (11 mm) as you might expect, but approximately two thirds of
that value - 0.3" (7.7 mm). If you want to know why, see
sensor sizes.
Diagonal is calculated by the use of Pythagorean theorem:
where w = sensor width and h = sensor height
Diagonal is calculated by the use of Pythagorean theorem:
| Diagonal = √ | w² + h² |
Praktica DCZ 12.1 diagonal:
w = 6.16 mm
h = 4.62 mm
h = 4.62 mm
| Diagonal = √ | 6.16² + 4.62² | = 7.70 mm |
Surface area
Surface area is calculated by multiplying the width and the height of a sensor.
Width = 6.16 mm
Height = 4.62 mm
Surface area = 6.16 × 4.62 = 28.46 mm²
Width = 6.16 mm
Height = 4.62 mm
Surface area = 6.16 × 4.62 = 28.46 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 |
Praktica DCZ 12.1 pixel pitch:
Sensor width = 6.16 mm
Sensor resolution width = 3995 pixels
Sensor resolution width = 3995 pixels
| Pixel pitch = | 6.16 | × 1000 | = 1.54 µm |
| 3995 |
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 |
Praktica DCZ 12.1 pixel area:
Pixel pitch = 1.54 µm
Pixel area = 1.54² = 2.37 µm²
Pixel area = 1.54² = 2.37 µm²
Pixel density
Pixel density can be calculated with the following formula:
You could also use this formula:
| Pixel density = ( | sensor resolution width in pixels | )² / 1000000 |
| sensor width in cm |
You could also use this formula:
| Pixel density = | effective megapixels × 1000000 | / 10000 |
| sensor surface area in mm² |
Praktica DCZ 12.1 pixel density:
Sensor resolution width = 3995 pixels
Sensor width = 0.616 cm
Pixel density = (3995 / 0.616)² / 1000000 = 42.06 MP/cm²
Sensor width = 0.616 cm
Pixel density = (3995 / 0.616)² / 1000000 = 42.06 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
Praktica DCZ 12.1 sensor resolution:
Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 12.00
Resolution horizontal: X × r = 3004 × 1.33 = 3995
Resolution vertical: X = 3004
Sensor resolution = 3995 x 3004
Sensor height = 4.62 mm
Effective megapixels = 12.00
| r = 6.16/4.62 = 1.33 |
|
Resolution vertical: X = 3004
Sensor resolution = 3995 x 3004
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 |
Praktica DCZ 12.1 crop factor:
Sensor diagonal = 7.70 mm
| Crop factor = | 43.27 | = 5.62 |
| 7.70 |
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).
Praktica DCZ 12.1 equivalent aperture:
Crop factor = 5.62
Aperture = f3.0 - f5.6
35-mm equivalent aperture = (f3.0 - f5.6) × 5.62 = f16.9 - f31.5
Aperture = f3.0 - f5.6
35-mm equivalent aperture = (f3.0 - f5.6) × 5.62 = f16.9 - f31.5
Enter your screen size (diagonal)
My screen size is
inches
Actual size is currently adjusted to screen.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a sensor won't be shown correctly.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a sensor won't be shown correctly.