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

Contrast ratio results

Contrast ratio 2345:1 (edge: 2872:1)
Monitor model
Submitted 22 Jun 2020 12:06 CEST, by 84.209.*.*
Camera model samsung SM-G973F
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 3.1 s (Set EV to +3.6)
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 3.8 s (Set EV to +3.9)

Black
Screen photo
[open image]
Luminance 0.07 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –6.12 stops   (aim for –2 to –3)
Exposure spread 1.41 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/4   ISO: 400   F-number: 2.4
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 167 cd/m2
Luminance spread 19 cd/m2 (2 standard deviations)
Exposure value –1.88 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/498   ISO: 400   F-number: 2.4
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.06 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –6.41 stops   (aim for –2 to –3)
Exposure spread 0.88 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/4   ISO: 400   F-number: 2.4
Focal length: 26 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.