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

Contrast ratio results

Contrast ratio 2009:1
Monitor model
Submitted 16 Jun 2022 10:48 CEST, by 71.238.*.*
Camera model Nikon COOLPIX L820
Processing remarks

Note: image file 2: suggested exposure time: 1/210 s (Set EV to -1.1)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.12 cd/m2
Luminance spread 0.12 cd/m2 (2 standard deviations)
Exposure value –3.05 stops   (aim for –2 to –3)
Exposure spread 1.6 stops
Area used for calculation 0.332 x 0.332
Camera settings Exposure time: 1/4   ISO: 3200   F-number: 3
Focal length: 23 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 233 cd/m2
Luminance spread 33 cd/m2 (2 standard deviations)
Exposure value –1.4 stops   (aim for –2 to –3)
Exposure spread 0.21 stops
Area used for calculation 0.332 x 0.332
Camera settings Exposure time: 1/100   ISO: 125   F-number: 3
Focal length: 23 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.