Sony Cybershot DSC H90

Specifications

Cybershot DSC H90 image
Brand: Sony
Model: Cybershot DSC H90
MegaPixels: 16.10
Sensor: 1/2.3" (~ 6.16 x 4.62 mm)
Price: Amazon, B&H Photo, Adorama

Sensor INFO

Sony Cybershot DSC H90 comes with a 1/2.3" (~ 6.16 x 4.62 mm) CCD sensor, which has a diagonal of 7.70 mm (0.3 inch) and a surface area of 28.46 mm².
Diagonal
7.70 mm
Surface area
28.5 mm²
Pixel pitch
1.33 µm
Pixel area
1.77 µm²
Pixel density
56.42 MP/cm²
If you want to know about the accuracy of these numbers, click here.
Actual sensor size:
This is the actual sensor size of Sony Cybershot DSC H90.
(Note: on some systems the presentation might not be 100% accurate. If in doubt, take a ruler and measure it. It should be 6.16 x 4.62 mm)
The sensor has a surface area of 28.5 mm². There are approx. 16,100,000 photosites (pixels) on this area. Pixel pitch, which is a measure of the distance between pixels, is 1.33 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 1.77 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. Sony Cybershot DSC H90 has a pixel density of 56.42 MP/cm².

These numbers are important in terms of assessing the overall quality of a digital camera. Generally, the bigger the sensor, pixel pitch and photosite area, and the smaller the pixel density, the better the camera. If you want to see how Sony Cybershot DSC H90 compares to other digital cameras, click here.

Specifications

Brand
Sony (Sony cameras)
Model
Cybershot DSC H90
Megapixels
16.10
Sensor size
1/2.3" (~ 6.16 x 4.62 mm)
Sensor type
CCD
Sensor resolution
4627 x 3479 
Max. resolution
4608 x 3456
Min. resolution
640 x 480
Crop factor
5.62 
Optical zoom
16x
Digital zoom
Yes
ISO
auto
Auto focus
Yes
Manual focus
No
Normal focus range
n/a
Macro focus range
5 cm
Focal length (35mm equiv.)
24 - 384 mm
Aperture priority
No
Aperture
f3.3 - f5.9
Aperture (35mm equiv.)
f18.5 - f33.2 
Metering
Multi, Center-weighted, Spot
Exposure Compensation
-2EV - +2EV with 1/3EV steps
Shutter priority
No
Min. shutter speed
30 sec
Max. shutter speed
1/1600 sec
Flash modes
Anti red-eye, Auto, Fill in, Off, Slow flash
Built-in flash
Yes
External flash
No
Viewfinder
None
White balance presets
6
LCD display
Yes
LCD size
3"
LCD resolution
460,800
Selftimer
Yes
Storage types
Memory Stick Duo, Memory Stick Pro Duo, SDHC, SDXC, Secure Digital
USB
USB 2.0 (480 Mbit/sec)
Batteries
Lithium-Ion NP-BG1 battery and charger
Weight
222g
Dimensions
105x60x34 mm
Year
2012


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Diagonal

The diagonal of Sony Cybershot DSC H90 image sensor is not 1/2.3 inch as you might expect, but approximately two thirds of that value - 0.3 inch. If you want to know why, see sensor sizes.

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


Sony Cybershot DSC H90 diagonal

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.

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 H90 pixel pitch

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


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 H90 pixel area

Pixel pitch = 1.33 µm

Pixel area = 1.33² = 1.77 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 H90 pixel density

Sensor resolution width = 4627 pixels
Sensor width = 0.616 cm

Pixel density = (4627 / 0.616)² / 1000000 = 56.42 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 H90 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


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 H90 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 H90 equivalent aperture

Crop factor = 5.62
Aperture = f3.3 - f5.9

35-mm equivalent aperture = (f3.3 - f5.9) × 5.62 = f18.5 - f33.2


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