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

Contrast ratio results

Contrast ratio 1626:1 (edge: 3919:1)
Monitor model
Submitted 15 Jun 2024 06:13 CEST, by 178.36.*.*
Camera model samsung Galaxy A54 5G
Processing remarks

Note: image file 1: suggested exposure time: 1.7 s (Set EV to -2.2)

Black
Screen photo
[open image]
Luminance 0.07 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –1.31 stops   (aim for –2 to –3)
Exposure spread 0.35 stops
Area used for calculation 0.332 x 0.332
Camera settings Exposure time: 4   ISO: 400   F-number: 1.8
Focal length: 23 mm   (35 mm equivalent)
Exposure compensation: -1
White
Screen photo
[open image]
Luminance 114 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –1.6 stops   (aim for –2 to –3)
Exposure spread 0.15 stops
Area used for calculation 0.332 x 0.332
Camera settings Exposure time: 1/498   ISO: 400   F-number: 1.8
Focal length: 23 mm   (35 mm equivalent)
Exposure compensation: -0.3
Black at screen edge
Screen photo
[open image]
Luminance 0.03 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –2.57 stops   (aim for –2 to –3)
Exposure spread 2.73 stops
Area used for calculation 0.443 x 0.249
Camera settings Exposure time: 4   ISO: 400   F-number: 1.8
Focal length: 23 mm   (35 mm equivalent)
Exposure compensation: -1.7

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.