Contrast ratio results for Acer R240HY

Contrast ratio 948:1
Monitor model Acer R240HY
Submitted 27 Apr 2020 02:57 CEST, by 68.34.*.*
Camera model Canon EOS 60D
Processing remarks

Warning: image file 1: camera was zoomed in too much.
Warning: image file 2: camera was zoomed in too much.

Black
Screen photo
Luminance 0.18 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –2.66 stops   (aim for –2 to –3)
Exposure spread 0.61 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 4   ISO: 400   F-number: 4.6
Focal length: 94.4 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 169 cd/m2
Luminance spread 37 cd/m2 (2 standard deviations)
Exposure value –2.4 stops   (aim for –2 to –3)
Exposure spread 0.32 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/197   ISO: 400   F-number: 4.6
Focal length: 94.4 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.