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

Contrast ratio results

Contrast ratio 881:1
Monitor model
Submitted 09 Sep 2020 22:45 CEST, by 73.76.*.*
Camera model Sony ILCE-7RM2
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 2: automatic white balance can cause inaccuracies.

Black
Screen photo
[open image]
Luminance 0.14 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –3.06 stops   (aim for –2 to –3)
Exposure spread 0.65 stops
Area used for calculation 0.764 x 0.859
Camera settings Exposure time: 0.6   ISO: 400   F-number: 1.8
Focal length: 55 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 122 cd/m2
Luminance spread 48 cd/m2 (2 standard deviations)
Exposure value –1.51 stops   (aim for –2 to –3)
Exposure spread 0.57 stops
Area used for calculation 0.764 x 0.859
Camera settings Exposure time: 1/500   ISO: 400   F-number: 1.8
Focal length: 55 mm   (35 mm equivalent)
Exposure compensation: 0

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.