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

Contrast ratio results

Contrast ratio 1145:1
Monitor model
Submitted 02 Jul 2021 15:05 CEST, by 110.54.*.*
Camera model Canon EOS 80D
Processing remarks

Note: image file 1: suggested exposure time: 4.5 s (Set EV to +1.2)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Note: image file 2: suggested exposure time: 1/260 s (Set EV to +1.4)

Black
Screen photo
[open image]
Luminance 0.1 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –3.66 stops   (aim for –2 to –3)
Exposure spread 0.32 stops
Area used for calculation 0.389 x 0.437
Camera settings Exposure time: 2   ISO: 400   F-number: 3.5
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 119 cd/m2
Luminance spread 54 cd/m2 (2 standard deviations)
Exposure value –3.87 stops   (aim for –2 to –3)
Exposure spread 0.67 stops
Area used for calculation 0.389 x 0.437
Camera settings Exposure time: 1/664   ISO: 400   F-number: 3.5
Focal length: 28 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.