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

Contrast ratio results for Dell

Contrast ratio 587:1
Monitor model Dell
Submitted 10 Sep 2024 18:18 CEST, by 81.204.*.*
Camera model samsung SM-A528B
Processing remarks

Note: image file 1: suggested exposure time: 0.3 s (Set EV to +0.3)
Warning: image file 2: Overexposed. Please decrease the shutter time.

Black
Screen photo
[open image]
Luminance 0.36 cd/m2
Luminance spread 0.13 cd/m2 (2 standard deviations)
Exposure value –0.94 stops   (aim for –2 to –3)
Exposure spread 0.54 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 1   ISO: 400   F-number: 1.8
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: 1.9
White
Screen photo
[open image]
Luminance 211 cd/m2
Luminance spread 13 cd/m2 (2 standard deviations)
Exposure value –0.2 stops   (aim for –2 to –3)
Exposure spread 0.09 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 1/350   ISO: 400   F-number: 1.8
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: 1.3

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.