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

Contrast ratio results

Contrast ratio 3647:1
Monitor model
Submitted 05 Nov 2022 11:33 CET, by 66.189.*.*
Camera model samsung SM-G781U
Processing remarks

Warning: image file 1: Overexposed. Please decrease the shutter time.
Note: image file 1: suggested exposure time: 2.4 s (Set EV to -3.0)

Black
Screen photo
[open image]
Luminance 0.05 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –0.43 stops   (aim for –2 to –3)
Exposure spread 0.03 stops
Area used for calculation 0.425 x 0.319
Camera settings Exposure time: 10   ISO: 400   F-number: 1.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: -0.9
White
Screen photo
[open image]
Luminance 187 cd/m2
Luminance spread 4 cd/m2 (2 standard deviations)
Exposure value –0.89 stops   (aim for –2 to –3)
Exposure spread 0.03 stops
Area used for calculation 0.425 x 0.319
Camera settings Exposure time: 1/500   ISO: 400   F-number: 1.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: -0.9

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.