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

Contrast ratio results for VX239

Contrast ratio 1140:1
Monitor model VX239
Submitted 22 May 2022 20:38 CEST, by 82.64.*.*
Camera model OnePlus A6003
Processing remarks

image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.

Black
Screen photo
[open image]
Luminance 0.02 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –2.71 stops   (aim for –2 to –3)
Exposure spread 0.54 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 4   ISO: 400   F-number: 1.7
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: -0.167
White
Screen photo
[open image]
Luminance 27 cd/m2
Luminance spread 8 cd/m2 (2 standard deviations)
Exposure value –1.52 stops   (aim for –2 to –3)
Exposure spread 0.44 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 1/125   ISO: 400   F-number: 1.7
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: -0.167

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.