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

Contrast ratio results

Contrast ratio 854:1
Monitor model
Submitted 26 Dec 2020 09:14 CET, by 66.214.*.*
Camera model Google Pixel 4a 5G
Processing remarks

Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.

Black
Screen photo
[open image]
Luminance 0.21 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –2.12 stops   (aim for –2 to –3)
Exposure spread 0.04 stops
Area used for calculation 0.353 x 0.378
Camera settings Exposure time: 0.7   ISO: 395   F-number: 1.7
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 175 cd/m2
Luminance spread 16 cd/m2 (2 standard deviations)
Exposure value –2.48 stops   (aim for –2 to –3)
Exposure spread 0.13 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 1/1560   ISO: 395   F-number: 1.7
Focal length: 25 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.