Rollei Kids 100


Brand: Rollei
Model: Kids 100
Megapixels: 0.30
Sensor: 2/3" (~ 8.8 x 6.6 mm)
Price: check here »

Sensor info

Rollei Kids 100 comes with a 2/3" (~ 8.8 x 6.6 mm) CMOS sensor, which has a diagonal of 11.00 mm (0.43") and a surface area of 58.08 mm².
11.00 mm
Surface area
58.1 mm²
Pixel pitch
13.92 µm
Pixel area
193.77 µm²
Pixel density
0.52 MP/cm²
If you want to know about the accuracy of these numbers, click here.

Actual sensor size

Note: Actual size is set to screen → change »
This is the actual size of the Kids 100 sensor: ~8.8 x 6.6 mm
The sensor has a surface area of 58.1 mm². There are approx. 300,000 photosites (pixels) on this area. Pixel pitch, which is a measure of the distance between pixels, is 13.92 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 193.77 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. Rollei Kids 100 has a pixel density of 0.52 MP/cm².

These numbers are important in terms of assessing the overall quality of a digital camera. Generally, the bigger (and newer) the sensor, pixel pitch and photosite area, and the smaller the pixel density, the better the camera. If you want to see how Kids 100 compares to other cameras, click here.


Brand: Rollei
Model: Kids 100
Megapixels: 0.30
Sensor size: 2/3" (~ 8.8 x 6.6 mm)
Sensor type: CMOS
Sensor resolution: 632 x 475
Max. image resolution: 640 x 480
Crop factor: 3.93
Optical zoom: No
Digital zoom: Yes
ISO: Auto
RAW support:
Manual focus:
Normal focus range:
Macro focus range:
Focal length (35mm equiv.): 40 mm
Aperture priority: No
Max aperture:
Max. aperture (35mm equiv.): n/a
Depth of field: simulate →
Metering: Centre weighted
Exposure Compensation: ±2 EV (in 1/3 EV steps)
Shutter priority: No
Min. shutter speed:
Max. shutter speed:
Built-in flash:
External flash:
Viewfinder: None
White balance presets:
Screen size: 1.5"
Screen resolution:
Video capture:
Storage types:
USB: USB 2.0 (480 Mbit/sec)
Battery: 4x AA
Weight: 250 g
Dimensions: 148 x 90 x 35 mm
Year: 2010

Compare Kids 100 with another camera



The diagonal of Kids 100 sensor is not 2/3 or 0.67" (16.9 mm) as you might expect, but approximately two thirds of that value - 0.43" (11 mm). 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

Rollei Kids 100 diagonal:

w = 8.80 mm
h = 6.60 mm
Diagonal =  8.80² + 6.60²   = 11.00 mm

Surface area

Surface area is calculated by multiplying the width and the height of a sensor.

Width = 8.80 mm
Height = 6.60 mm

Surface area = 8.80 × 6.60 = 58.08 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

Rollei Kids 100 pixel pitch:

Sensor width = 8.80 mm
Sensor resolution width = 632 pixels
Pixel pitch =   8.80  × 1000  = 13.92 µm

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

Rollei Kids 100 pixel area:

Pixel pitch = 13.92 µm

Pixel area = 13.92² = 193.77 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

Rollei Kids 100 pixel density:

Sensor resolution width = 632 pixels
Sensor width = 0.88 cm

Pixel density = (632 / 0.88)² / 1000000 = 0.52 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
3. To get sensor resolution we then multiply X with the corresponding ratio:

Resolution horizontal: X × r
Resolution vertical: X

Rollei Kids 100 sensor resolution:

Sensor width = 8.80 mm
Sensor height = 6.60 mm
Effective megapixels = 0.30
r = 8.80/6.60 = 1.33
X =  0.30 × 1000000  = 475
Resolution horizontal: X × r = 475 × 1.33 = 632
Resolution vertical: X = 475

Sensor resolution = 632 x 475

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

Rollei Kids 100 crop factor:

Sensor diagonal = 11.00 mm
Crop factor =   43.27  = 3.93

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).

Rollei Kids 100 equivalent aperture:

Aperture is a lens characteristic, so it's calculated only for fixed lens cameras. If you want to know the equivalent aperture for Rollei Kids 100, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Rollei Kids 100 is 3.93

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