Contrast ratio of Acer X223w

Contrast ratio 475:1 (edge: 496:1)
Monitor model Acer X223w
Submitted 01 Aug 2019 03:43 CEST, by 172.103.*.*
Camera model Canon EOS 5D Mark II
Processing remarks


Black
Screen photo
Luminance 0.21 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –3 stops   (aim for –2 to –3)
Exposure spread 0.5 stops
Area used for calculation 0.325 x 0.366
Camera settings Exposure time: 1   ISO: 800   F-number: 4
Focal length: 23.4 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 102 cd/m2
Luminance spread 28 cd/m2 (2 standard deviations)
Exposure value –2.75 stops   (aim for –2 to –3)
Exposure spread 0.4 stops
Area used for calculation 0.325 x 0.366
Camera settings Exposure time: 1/400   ISO: 800   F-number: 4
Focal length: 23.4 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 0.21 cd/m2
Luminance spread 0.12 cd/m2 (2 standard deviations)
Exposure value –3.06 stops   (aim for –2 to –3)
Exposure spread 0.84 stops
Area used for calculation 0.325 x 0.366
Camera settings Exposure time: 1   ISO: 800   F-number: 4
Focal length: 23.4 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.