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

Contrast ratio results

Contrast ratio 8377:1
Monitor model
Submitted 27 Aug 2019 19:37 CEST, by 49.207.*.*
Camera model OnePlus A5000
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 16.3 s (Set EV to +6.0)
Note: image file 2: suggested exposure time: 1/510 s (Set EV to -1.4)

Black
Screen photo
[open image]
Luminance 0.01 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –8.53 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.303 x 0.514
Camera settings Exposure time: 1/4   ISO: 400   F-number: 1.7
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 56 cd/m2
Luminance spread 3 cd/m2 (2 standard deviations)
Exposure value –1.14 stops   (aim for –2 to –3)
Exposure spread 0.08 stops
Area used for calculation 0.32 x 0.415
Camera settings Exposure time: 1/200   ISO: 400   F-number: 1.7
Focal length: 24 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.