Praktica Luxmedia 16-Z24S vs. Praktica Luxmedia 18-Z36C

Comparison

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Luxmedia 16-Z24S image
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Luxmedia 18-Z36C image
Praktica Luxmedia 16-Z24S Praktica Luxmedia 18-Z36C
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Megapixels
16.10
18.00
Max. image resolution
4608 x 3456
4896 x 3672

Sensor

Sensor type
CCD
CMOS
Sensor size
1/2.3" (~ 6.16 x 4.62 mm)
1/2.3" (~ 6.16 x 4.62 mm)
Sensor resolution
4627 x 3479
4893 x 3679
Diagonal
7.70 mm
7.70 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 »

Actual sensor size

Note: Actual size is set to screen → change »
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1 : 1
(ratio)
Praktica Luxmedia 16-Z24S Praktica Luxmedia 18-Z36C
Surface area:
28.46 mm² vs 28.46 mm²
Difference: 0 mm² (0%)
Luxmedia 16-Z24S and Luxmedia 18-Z36C sensors are the same size.
Pixel pitch
1.33 µm
1.26 µm
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.
Difference: 0.07 µm (6%)
Pixel pitch of Luxmedia 16-Z24S is approx. 6% higher than pixel pitch of Luxmedia 18-Z36C.
Pixel area
1.77 µm²
1.59 µm²
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.
Relative pixel sizes:
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Pixel area difference: 0.18 µm² (11%)
A pixel on Praktica Luxmedia 16-Z24S sensor is approx. 11% bigger than a pixel on Praktica Luxmedia 18-Z36C.
Pixel density
56.42 MP/cm²
63.09 MP/cm²
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.
Difference: 6.67 µm (12%)
Praktica Luxmedia 18-Z36C has approx. 12% higher pixel density than Praktica Luxmedia 16-Z24S.
To learn about the accuracy of these numbers, click here.



Specs

Praktica Luxmedia 16-Z24S
Praktica Luxmedia 18-Z36C
Crop factor
5.62
5.62
Total megapixels
Effective megapixels
16.10
18.00
Optical zoom
24x
36x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 100, 200, 400, 800, 1600
Auto, 100, 200, 400, 800, 1600, 3200, 6400, 12800
RAW
Manual focus
Normal focus range
Macro focus range
Focal length (35mm equiv.)
25 - 600 mm
22.5 - 810 mm
Aperture priority
No
No
Max. aperture
f3 - f6.9
f3.4 - f5.7
Max. aperture (35mm equiv.)
f16.9 - f38.8
f19.1 - f32
Metering
Wide, center
Multi, center, spot
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
15 sec
Max. shutter speed
1/2000 sec
1/2000 sec
Built-in flash
External flash
Viewfinder
None
Electronic
White balance presets
6
5
Screen size
3"
3"
Screen resolution
460,800 dots
640 x 480 dots
Video capture
Max. video resolution
Storage types
64 internal memory, compatible with memory cards
SD/SDHC/SDXC/UHS I-1 memory cards
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Rechargeable Li-Ion battery
Rechargeable Li-Ion battery NP120L 3,7V/1700 mAh
Weight
120 g
360 g
Dimensions
93 x 55 x 20 mm
126.5 x 111 x 88 mm
Year
2012
2012




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Diagonal

Diagonal is calculated by the use of Pythagorean theorem:
Diagonal = √  w² + h²
where w = sensor width and h = sensor height

Praktica Luxmedia 16-Z24S diagonal

The diagonal of Luxmedia 16-Z24S sensor is not 1/2.3 or 0.43" (11 mm) as you might expect, but approximately two thirds of that value - 7.7 mm. If you want to know why, see sensor sizes.

w = 6.16 mm
h = 4.62 mm
Diagonal = √  6.16² + 4.62²   = 7.70 mm

Praktica Luxmedia 18-Z36C diagonal

The diagonal of Luxmedia 18-Z36C sensor is not 1/2.3 or 0.43" (11 mm) as you might expect, but approximately two thirds of that value - 7.7 mm. If you want to know why, see sensor sizes.

w = 6.16 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.

Luxmedia 16-Z24S sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

Luxmedia 18-Z36C sensor area

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

Luxmedia 16-Z24S pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4627 pixels
Pixel pitch =   6.16  × 1000  = 1.33 µm
4627

Luxmedia 18-Z36C pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4893 pixels
Pixel pitch =   6.16  × 1000  = 1.26 µm
4893


Pixel area

The area of one pixel can be calculated by simply squaring the pixel pitch:
Pixel area = pixel pitch²

You could also divide sensor surface area with effective megapixels:
Pixel area =   sensor surface area in mm²
effective megapixels

Luxmedia 16-Z24S pixel area

Pixel pitch = 1.33 µm

Pixel area = 1.33² = 1.77 µm²

Luxmedia 18-Z36C pixel area

Pixel pitch = 1.26 µm

Pixel area = 1.26² = 1.59 µm²


Pixel density

Pixel density can be calculated with the following 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

Luxmedia 16-Z24S pixel density

Sensor resolution width = 4627 pixels
Sensor width = 0.616 cm

Pixel density = (4627 / 0.616)² / 1000000 = 56.42 MP/cm²

Luxmedia 18-Z36C pixel density

Sensor resolution width = 4893 pixels
Sensor width = 0.616 cm

Pixel density = (4893 / 0.616)² / 1000000 = 63.09 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:
(X × r) × X = effective megapixels × 1000000    →   
X = √  effective megapixels × 1000000
r
3. To get sensor resolution we then multiply X with the corresponding ratio:

Resolution horizontal: X × r
Resolution vertical: X

Luxmedia 16-Z24S sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 16.10
r = 6.16/4.62 = 1.33
X = √  16.10 × 1000000  = 3479
1.33
Resolution horizontal: X × r = 3479 × 1.33 = 4627
Resolution vertical: X = 3479

Sensor resolution = 4627 x 3479

Luxmedia 18-Z36C sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 18.00
r = 6.16/4.62 = 1.33
X = √  18.00 × 1000000  = 3679
1.33
Resolution horizontal: X × r = 3679 × 1.33 = 4893
Resolution vertical: X = 3679

Sensor resolution = 4893 x 3679


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


Luxmedia 16-Z24S crop factor

Sensor diagonal in mm = 7.70 mm
Crop factor =   43.27  = 5.62
7.70

Luxmedia 18-Z36C crop factor

Sensor diagonal in mm = 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).

Luxmedia 16-Z24S equivalent aperture

Crop factor = 5.62
Aperture = f3 - f6.9

35-mm equivalent aperture = (f3 - f6.9) × 5.62 = f16.9 - f38.8

Luxmedia 18-Z36C equivalent aperture

Crop factor = 5.62
Aperture = f3.4 - f5.7

35-mm equivalent aperture = (f3.4 - f5.7) × 5.62 = f19.1 - f32

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