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

Contrast ratio results

Contrast ratio 3:1
Monitor model
Submitted 08 Jul 2024 22:50 CEST, by 14.153.*.*
Camera model samsung Galaxy S23 Ultra
Processing remarks

Warning: image file 1: Overexposed. Please decrease the shutter time.
Note: image file 1: suggested exposure time: 1/9 s (Set EV to -1.2)
Note: image file 2: suggested exposure time: 0.4 s (Set EV to -1.4)

Black
Screen photo
[open image]
Luminance 0.29 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –1.09 stops   (aim for –2 to –3)
Exposure spread 0.07 stops
Area used for calculation 0.443 x 0.249
Camera settings Exposure time: 1   ISO: 400   F-number: 1.7
Focal length: 23 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 0.98 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –0.33 stops   (aim for –2 to –3)
Exposure spread 0.07 stops
Area used for calculation 0.443 x 0.249
Camera settings Exposure time: 0.5   ISO: 400   F-number: 1.7
Focal length: 23 mm   (35 mm equivalent)
Exposure compensation: 1

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.