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

Contrast ratio results for LS27A800UJU

Contrast ratio 10725:1
Monitor model LS27A800UJU
Submitted 28 Sep 2022 20:54 CEST, by 46.223.*.*
Camera model OnePlus A6000
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 48.0 s (Set EV to +6.4)

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –9.08 stops   (aim for –2 to –3)
Exposure spread 1.98 stops
Area used for calculation 0.319 x 0.507
Camera settings Exposure time: 0.5   ISO: 400   F-number: 1.7
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: -0.167
White
Screen photo
[open image]
Luminance 24 cd/m2
Luminance spread 4 cd/m2 (2 standard deviations)
Exposure value –3.34 stops   (aim for –2 to –3)
Exposure spread 0.22 stops
Area used for calculation 0.319 x 0.507
Camera settings Exposure time: 1/400   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.