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

Contrast ratio results for LG

Contrast ratio 1397:1
Monitor model LG
Submitted 01 Aug 2020 18:04 CEST, by 200.163.*.*
Camera model motorola moto x4
Processing remarks

Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 3.9 s (Set EV to +5.9)
Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Note: image file 2: suggested exposure time: 1/430 s (Set EV to -1.8)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.08 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –8.35 stops   (aim for –2 to –3)
Exposure spread 0.98 stops
Area used for calculation 0.528 x 0.667
Camera settings Exposure time: 1/15   ISO: 198   F-number: 2
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 111 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –0.66 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.528 x 0.673
Camera settings Exposure time: 1/120   ISO: 234   F-number: 2
Focal length: 0 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.