Rollei Compactline 52


Compactline 52 image
Brand: Rollei
Model: Compactline 52
MegaPixels: 5.00
Sensor: 1/2.3" (~ 6.16 x 4.62 mm)
Price: Amazon, B&H Photo, Adorama

Sensor INFO

Rollei Compactline 52 comes with a 1/2.3" (~ 6.16 x 4.62 mm) CMOS sensor, which has a diagonal of 7.70 mm (0.3 inch) and a surface area of 28.46 mm².
7.70 mm
Surface area
28.5 mm²
Pixel pitch
2.39 µm
Pixel area
5.71 µm²
Pixel density
17.53 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 Rollei Compactline 52.
(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. 5,000,000 photosites (pixels) on this area. Pixel pitch, which is a measure of the distance between pixels, is 2.39 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 5.71 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 Compactline 52 has a pixel density of 17.53 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 Rollei Compactline 52 compares to other digital cameras, click here.


Rollei (Rollei cameras)
Compactline 52
Sensor size
1/2.3" (~ 6.16 x 4.62 mm)
Sensor type
Sensor resolution
2579 x 1939 
Max. resolution
2592 x 1944
Min. resolution
640 x 480
Crop factor
Optical zoom
Digital zoom
Auto focus
Manual focus
Normal focus range
80 cm
Macro focus range
Focal length (35mm equiv.)
41 mm
Aperture priority
Aperture (35mm equiv.)
Centre weighted
Exposure Compensation
-2EV - +2EV with 1/3EV steps
Shutter priority
Min. shutter speed
1/8 sec
Max. shutter speed
1/4000 sec
Flash modes
Anti red-eye, Auto, Fill in, Off
Built-in flash
External flash
White balance presets
LCD display
LCD size
LCD resolution
Storage types
USB 2.0 Hi-Speed
2x AAA
90x59x24.4 mm

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The diagonal of Rollei Compactline 52 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

Rollei Compactline 52 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

Rollei Compactline 52 pixel pitch

Sensor width = 6.16 mm
Sensor resolution width = 2579 pixels
Pixel pitch =   6.16  × 1000  = 2.39 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 Compactline 52 pixel area

Pixel pitch = 2.39 µm

Pixel area = 2.39² = 5.71 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 Compactline 52 pixel density

Sensor resolution width = 2579 pixels
Sensor width = 0.616 cm

Pixel density = (2579 / 0.616)² / 1000000 = 17.53 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
3. To get sensor resolution we then multiply X with the corresponding ratio:

Resolution horizontal: X × r
Resolution vertical: X

Rollei Compactline 52 sensor resolution

Sensor width = 6.16 mm
Sensor height = 4.62 mm
Effective megapixels = 5.00
r = 6.16/4.62 = 1.33
X =  5.00 × 1000000  = 1939
Resolution horizontal: X × r = 1939 × 1.33 = 2579
Resolution vertical: X = 1939

Sensor resolution = 2579 x 1939

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 Compactline 52 crop factor

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

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 Compactline 52 equivalent aperture

Crop factor = 5.62
Aperture = f2.8

35-mm equivalent aperture = (f2.8) × 5.62 = f15.7

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