Contrast ratio | Test results | LCD test | Small-screen tests | Lagom home

Contrast ratio results

Contrast ratio 833:1
Monitor model
Submitted 26 Jun 2022 13:57 CEST, by 91.158.*.*
Camera model Sony DSC-RX10M4
Processing remarks

Warning: image file 2: automatic white balance can cause inaccuracies.
Warning: Image F-number settings are not the same.
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
[open image]
Luminance 0.14 cd/m2
Luminance spread 0.1 cd/m2 (2 standard deviations)
Exposure value –3.09 stops   (aim for –2 to –3)
Exposure spread 1.08 stops
Area used for calculation 0.333 x 0.375
Camera settings Exposure time: 1   ISO: 400   F-number: 2.4
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0.7
White
Screen photo
[open image]
Luminance 120 cd/m2
Luminance spread 13 cd/m2 (2 standard deviations)
Exposure value –2.48 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.389 x 0.437
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: -0.3

The luminance values in cd/m2 are not very reliable, since camera sensitivities can easily differ up to 50% from their nominal value. Typically, the real luminance is 30% lower than this number. The area used for calculation is chosen such that it corresponds to a viewing angle of ±14° horizontally and ±10.5° vertically, which is equivalent to viewing the screen from a distance of about 1.5 times the diagonal size.

Unfortunately, there is a lot of variation in how cameras use EXIF settings. If photos from your camera your produce unusable results, try coming back in a few days. I review submitted pictures regularly and try to fix problems.