Sony Cybershot DSC TX66 vs. Sony Cybershot DSC-TX30

Comparison

Cybershot DSC TX66 image
vs.
Cybershot DSC-TX30 image

 

Sony Cybershot DSC TX66 Sony Cybershot DSC-TX30
Megapixels
18.20 18.20
Max. resolution
4896 x 3672 4896 x 3672
Price
Amazon, B&H Photo, Adorama Amazon, B&H Photo, Adorama

Sensor

Sensor type
BSI 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
4920 x 3699  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 TX66
vs.
Sony Cybershot DSC-TX30
 
Surface area:
Sony Cybershot DSC TX66
Sony Cybershot DSC-TX30
Difference: 0 mm² (0%)
Sony Cybershot DSC TX66 and Sony Cybershot DSC-TX30 have the same surface area.
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.
Pixel pitch
Sony Cybershot DSC TX66
Sony Cybershot DSC-TX30
Difference: 0 µm (0%)
Sony Cybershot DSC TX66 and Sony Cybershot DSC-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:
Sony Cybershot DSC TX66
vs.
Sony Cybershot DSC-TX30
Pixel area difference: 0 µm² (0%)
Sony Cybershot DSC TX66 and Sony Cybershot DSC-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.
Pixel density
Sony Cybershot DSC TX66
Sony Cybershot DSC-TX30
Difference: 0 MP/cm² (0%)
Sony Cybershot DSC TX66 and Sony Cybershot DSC-TX30 have the same pixel density.
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
n/a 18.20
Optical zoom
5x 5x
Digital zoom
Yes Yes
Iso
Auto, 80, 100, 125, 160, 200, 250, 320, 400, 500, 640, 800, 1000 Auto, 80 - 12800
Auto focus
Yes Yes
Manual focus
Yes Yes
Normal focus range
n/a n/a
Macro focus range
1 cm 3 cm
Focal length (35mm equiv.)
26 - 130 mm 26–130 mm
Aperture priority
No No
Aperture
f3.5 - f4.8 f3.5 - f4.8
Aperture (35mm equiv.)
f19.7 - f27  f19.7 - f27 
Metering
Multi, Center-weighted, Spot Multi, Center-weighted, Spot
Exposure compensation
±2 EV (at 1/3 EV steps) -2EV - +2EV with 1/3EV steps
Shutter priority
No No
Min. shutter speed
30 sec 4 sec
Max. shutter speed
1/4000 sec 1/1600 sec
Flash modes
Auto, On, Off, Slow Sync, Rear Slow Sync Auto, On, Off, Slow Sync, Advanced Flash
Built-in flash
Yes Yes
External flash
No No
Viewfinder
None None
White balance presets
7 7
LCD display
Yes Yes
LCD size
3.3" 3.3"
LCD resolution
1,229,760 1,229,760
Min. image resolution
640 x 480 640 x 480
Selftimer
Yes Yes
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)
Batteries
Lithium-Ion NP-BN battery and charger Rechargeable Battery Pack (NP-BN)
Weight
109g 140 g
Dimensions
93x54x13 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 Cybershot DSC TX66 diagonal

The diagonal of Sony Cybershot DSC TX66 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-TX30 diagonal

The diagonal of Sony Cybershot DSC-TX30 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 TX66 surface area

Width = 6.16 mm
Height = 4.62 mm

Surface area = 6.16 × 4.62 = 28.46 mm²

Sony Cybershot DSC-TX30 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 TX66 pixel pitch

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

Sony Cybershot DSC-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

Sony Cybershot DSC TX66 pixel area

Pixel pitch = 1.25 µm

Pixel area = 1.25² = 1.56 µm²

Sony Cybershot DSC-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

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

Sony Cybershot DSC TX66 pixel density

Sensor resolution width = 4920 pixels
Sensor width = 0.616 cm

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

Sony Cybershot DSC-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. 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 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

Sony Cybershot DSC-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


Sony Cybershot DSC TX66 crop factor

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

Sony Cybershot DSC-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).

Sony Cybershot DSC 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

Sony Cybershot DSC-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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