Sony Cybershot DSC HX50 vs. Sony Cybershot DSC HX20V

Comparison

Cybershot DSC HX50 image
vs.
Cybershot DSC HX20V image

 

Sony Cybershot DSC HX50 Sony Cybershot DSC HX20V
Megapixels
20.40 18.20
Max. resolution
5184 x 3888 4896 x 3672
Price
Amazon, B&H Photo, Adorama Amazon, B&H Photo, Adorama

Sensor

Sensor type
Exmor R CMOS Exmor R CMOS
Sensor size
1/2.3" (~ 6.16 x 4.62 mm) 1/2.3" (~ 6.16 x 4.62 mm)
Sensor resolution
5208 x 3916  4920 x 3699 
Diagonal
7.70 mm  7.70 mm 
Surface area
28.46 mm²  28.46 mm² 
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 sizes:
Sony Cybershot DSC HX50
vs.
Sony Cybershot DSC HX20V
 
Surface area:
Sony Cybershot DSC HX50
Sony Cybershot DSC HX20V
Difference: 0 mm² (0%)
Sony Cybershot DSC HX50 and Sony Cybershot DSC HX20V have the same surface area.
Pixel pitch
1.18 µm  1.25 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.
Pixel pitch
Sony Cybershot DSC HX50
Sony Cybershot DSC HX20V
Difference: 0.07 µm (6%)
Pixel pitch of Sony Cybershot DSC HX20V is approx. 6% higher than pixel pitch of Sony Cybershot DSC HX50.
Pixel area
1.39 µm²  1.56 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:
Sony Cybershot DSC HX50
vs.
Sony Cybershot DSC HX20V
Pixel area difference: 0.17 µm² (12%)
A pixel on Sony Cybershot DSC HX20V sensor is approx. 12% bigger than a pixel on Sony Cybershot DSC HX50.
Pixel density
71.48 MP/cm²  63.79 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.
Pixel density
Sony Cybershot DSC HX50
Sony Cybershot DSC HX20V
Difference: 7.69 MP/cm² (12%)
Sony Cybershot DSC HX50 has approx. 12% higher pixel density than Sony Cybershot DSC HX20V.
To learn about the accuracy of these numbers, click here.

Other specifications

Crop factor
5.62  5.62 
Total megapixels
n/a n/a
Effective megapixels
20.40 n/a
Optical zoom
30x 20x
Digital zoom
Yes Yes
Iso
Auto, 100, 200, 400, 800, 1600, 3200, (6400, 12800 with boost) Auto, 100 - 12800
Auto focus
Yes Yes
Manual focus
Yes Yes
Normal focus range
n/a 1 cm
Macro focus range
5 cm 1 cm
Focal length (35mm equiv.)
24 - 720 mm 25 - 500 mm
Aperture priority
Yes Yes
Aperture
f3.5 - f6.3 f3.2 - f8
Aperture (35mm equiv.)
f19.7 - f35.4  f18 - f45 
Metering
Multi, Center-weighted, Spot Centre weighted, Multi-segment, Spot
Exposure compensation
±2 (at 1/3 EV steps) -2EV - +2EV with 1/3EV steps
Shutter priority
Yes Yes
Min. shutter speed
30 sec 4 sec
Max. shutter speed
1/1600 sec 1/1600 sec
Flash modes
Auto, On, Off, Slow Sync, Rear Sync, Advanced Flash Anti red-eye, Auto, Fill in, Off, Slow flash
Built-in flash
Yes Yes
External flash
Yes No
Viewfinder
Electronic (optional) None
White balance presets
7 8
LCD display
Yes Yes
LCD size
3" 3"
LCD resolution
921,600 921,000
Min. image resolution
640 x 480 1920 x 1080
Selftimer
Yes Yes
Storage types
SD/SDHC/SDXC/Memory Stick Duo/Memory Stick Pro Duo, Memory Stick Pro-HG Duo Memory Stick Duo, Memory Stick Pro Duo, SDHC, SDXC, Secure Digital
USB
USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
Batteries
Lithium-Ion NP-BX1 battery and charger Lithium-Ion NP-BG1 battery and charger
Weight
272 g 221g
Dimensions
108.1 x 64.3 x 38.3 mm 92.9x54.4x13.4 mm
Year
2013 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

Sony Cybershot DSC HX50 diagonal

The diagonal of Sony Cybershot DSC HX50 image sensor is not 1/2.3 inch as you might expect, but approximately two thirds of that value. 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

Sony Cybershot DSC HX20V diagonal

The diagonal of Sony Cybershot DSC HX20V image sensor is not 1/2.3 inch as you might expect, but approximately two thirds of that value. 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.

Sony Cybershot DSC HX50 surface area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

Sony Cybershot DSC HX20V surface 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

Sony Cybershot DSC HX50 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 5208 pixels
Pixel pitch =   6.16  × 1000  = 1.18 µm
5208

Sony Cybershot DSC HX20V pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 4920 pixels
Pixel pitch =   6.16  × 1000  = 1.25 µm
4920


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

Sony Cybershot DSC HX50 pixel area

Pixel pitch = 1.18 µm

Pixel area = 1.18² = 1.39 µm²

Sony Cybershot DSC HX20V pixel area

Pixel pitch = 1.25 µm

Pixel area = 1.25² = 1.56 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

You could also use this formula:
Pixel density =   effective megapixels × 1000000  / 10000
sensor surface area in mm²

Sony Cybershot DSC HX50 pixel density

Sensor resolution width = 5208 pixels
Sensor width = 0.616 cm

Pixel density = (5208 / 0.616)² / 1000000 = 71.48 MP/cm²

Sony Cybershot DSC HX20V pixel density

Sensor resolution width = 4920 pixels
Sensor width = 0.616 cm

Pixel density = (4920 / 0.616)² / 1000000 = 63.79 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. 22.8 × 15.5 sensor for example has a ratio of 1.47.

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

Sony Cybershot DSC HX50 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 20.40
r = 6.16/4.62 = 1.33
X =  20.40 × 1000000  = 3916
1.33
Resolution horizontal: X × r = 3916 × 1.33 = 5208
Resolution vertical: X = 3916

Sensor resolution = 5208 x 3916

Sony Cybershot DSC HX20V sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 18.20
r = 6.16/4.62 = 1.33
X =  18.20 × 1000000  = 3699
1.33
Resolution horizontal: X × r = 3699 × 1.33 = 4920
Resolution vertical: X = 3699

Sensor resolution = 4920 x 3699


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


Sony Cybershot DSC HX50 crop factor

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

Sony Cybershot DSC HX20V 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).

Sony Cybershot DSC HX50 equivalent aperture

Crop factor = 5.62
Aperture = f3.5 - f6.3

35-mm equivalent aperture = (f3.5 - f6.3) × 5.62 = f19.7 - f35.4

Sony Cybershot DSC HX20V equivalent aperture

Crop factor = 5.62
Aperture = f3.2 - f8

35-mm equivalent aperture = (f3.2 - f8) × 5.62 = f18 - f45


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