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

Contrast ratio results for LG

Contrast ratio 125:1
Monitor model LG
Submitted 12 Feb 2017 13:13 CET, by 89.205.*.*
Camera model Digital Cam
Processing remarks

Warning: using the flash makes no sense.
Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
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.
Warning: image file 2: Overexposed. Please decrease the shutter time.
Warning: Image ISO settings are not the same.
Warning: Image F-number settings are not the same.

Black
Screen photo
[open image]
Luminance 27 cd/m2
Luminance spread 16 cd/m2 (2 standard deviations)
Exposure value –1.91 stops   (aim for –2 to –3)
Exposure spread 0.9 stops
Area used for calculation 0.528 x 0.297
Camera settings Exposure time: 1/30   ISO: 200   F-number: 2.8
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 3360 cd/m2
Luminance spread 3561 cd/m2 (2 standard deviations)
Exposure value –1.09 stops   (aim for –2 to –3)
Exposure spread 1.7 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/240   ISO: 100   F-number: 5.9
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.