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

Contrast ratio results for LG

Contrast ratio 146:1
Monitor model LG
Submitted 25 Oct 2017 18:29 CEST, by 194.150.*.*
Camera model Nikon D750
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 1/5 s (Set EV to +0.9)
Warning: image file 2: Overexposed. Please decrease the shutter time.
image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Note: image file 3: suggested exposure time: 1/380 s (Set EV to -5.3)
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
[open image]
Luminance 0.33 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –7.38 stops   (aim for –2 to –3)
Exposure spread 0.29 stops
Area used for calculation 0.694 x 0.781
Camera settings Exposure time: 1/160   ISO: 800   F-number: 1.8
Focal length: 50 mm   (35 mm equivalent)
Exposure compensation: -4
White
Screen photo
[open image]
Luminance 49 cd/m2
Luminance spread 1 cd/m2 (2 standard deviations)
Exposure value –0.19 stops   (aim for –2 to –3)
Exposure spread 0.03 stops
Area used for calculation 0.694 x 0.781
Camera settings Exposure time: 1/160   ISO: 800   F-number: 1.8
Focal length: 50 mm   (35 mm equivalent)
Exposure compensation: -4
Black at screen edge
Screen photo
[open image]
Luminance 23 cd/m2
Luminance spread 46 cd/m2 (2 standard deviations)
Exposure value –1.24 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.694 x 0.781
Camera settings Exposure time: 1/160   ISO: 800   F-number: 1.8
Focal length: 50 mm   (35 mm equivalent)
Exposure compensation: -4

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.