Sony Cyber-shot DSC-TX66 vs. Sony Cyber-shot DSC-TX30

Comparison

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Cyber-shot DSC-TX66 image
vs
Cyber-shot DSC-TX30 image
Sony Cyber-shot DSC-TX66 Sony Cyber-shot DSC-TX30
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Megapixels
18.20
18.20
Max. image resolution
4896 x 3672
4896 x 3672

Sensor

Sensor type
CMOS
CMOS
Sensor size
1/2.3" (~ 6.16 x 4.62 mm)
1/2.3" (~ 6.16 x 4.62 mm)
Sensor resolution
4920 x 3699
4920 x 3699
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 »
vs
1 : 1
(ratio)
Sony Cyber-shot DSC-TX66 Sony Cyber-shot DSC-TX30
Surface area:
28.46 mm² vs 28.46 mm²
Difference: 0 mm² (0%)
TX66 and TX30 sensors are the same size.
Pixel pitch
1.25 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.
Difference: 0 µm (0%)
TX66 and TX30 have the same pixel pitch.
Pixel area
1.56 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:
vs
Pixel area difference: 0 µm² (0%)
Sony TX66 and Sony TX30 have the same pixel area.
Pixel density
63.79 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.
Difference: 0 µm (0%)
Sony TX66 and Sony TX30 have the same pixel density.
To learn about the accuracy of these numbers, click here.

Specs

Sony TX66
Sony TX30
Crop factor
5.62
5.62
Total megapixels
Effective megapixels
18.20
Optical zoom
5x
5x
Digital zoom
Yes
Yes
ISO sensitivity
Auto, 80, 100, 125, 160, 200, 250, 320, 400, 500, 640, 800, 1000
Auto, 80 - 12800
RAW
Manual focus
Normal focus range
Macro focus range
1 cm
3 cm
Focal length (35mm equiv.)
26 - 130 mm
26-130 mm
Aperture priority
No
No
Max. aperture
f3.5 - f4.8
f3.5 - f4.8
Max. aperture (35mm equiv.)
f19.7 - f27
f19.7 - f27
Metering
Multi, Center-weighted, Spot
Multi, Center-weighted, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±2 EV (in 1/3 EV steps)
Shutter priority
No
No
Min. shutter speed
30 sec
4 sec
Max. shutter speed
1/4000 sec
1/1600 sec
Built-in flash
External flash
Viewfinder
None
None
White balance presets
7
7
Screen size
3.3"
3.3"
Screen resolution
1,229,760 dots
1,229,760 dots
Video capture
Max. video resolution
Storage types
Memory Stick Duo/Pro Duo/Pro-HG Duo, microSD/microSDHC
SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo/XC-HG Duo
USB
USB 2.0 (480 Mbit/sec)
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
Lithium-Ion NP-BN battery
Rechargeable Battery Pack (NP-BN)
Weight
109 g
140 g
Dimensions
93 x 54 x 13 mm
96.4 x 59.3 x 15.4 mm
Year
2012
2013



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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 TX66 diagonal

The diagonal of TX66 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

Sony TX30 diagonal

The diagonal of TX30 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.

TX66 sensor area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

TX30 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

TX66 pixel pitch

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

TX30 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

TX66 pixel area

Pixel pitch = 1.25 µm

Pixel area = 1.25² = 1.56 µm²

TX30 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

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

TX66 pixel density

Sensor resolution width = 4920 pixels
Sensor width = 0.616 cm

Pixel density = (4920 / 0.616)² / 1000000 = 63.79 MP/cm²

TX30 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.

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

TX66 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

TX30 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


TX66 crop factor

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

TX30 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).

TX66 equivalent aperture

Crop factor = 5.62
Aperture = f3.5 - f4.8

35-mm equivalent aperture = (f3.5 - f4.8) × 5.62 = f19.7 - f27

TX30 equivalent aperture

Crop factor = 5.62
Aperture = f3.5 - f4.8

35-mm equivalent aperture = (f3.5 - f4.8) × 5.62 = f19.7 - f27

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