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

Contrast ratio results

Contrast ratio 80393:1
Monitor model
Submitted 04 Jan 2024 01:44 CET, by 156.204.*.*
Camera model samsung SM-G977U
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 71.7 s (Set EV to +6.2)
Warning: image file 2: automatic white balance can cause inaccuracies.
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: 1/440 s (Set EV to -1.9)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –8.66 stops   (aim for –2 to –3)
Exposure spread 2.1 stops
Area used for calculation 0.413 x 0.329
Camera settings Exposure time: 1   ISO: 320   F-number: 2.4
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 305 cd/m2
Luminance spread 82 cd/m2 (2 standard deviations)
Exposure value –0.63 stops   (aim for –2 to –3)
Exposure spread 0.39 stops
Area used for calculation 0.416 x 0.326
Camera settings Exposure time: 1/120   ISO: 125   F-number: 2.4
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
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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.