Contrast ratio results for Acer XB270HU

Contrast ratio 1241:1
Monitor model Acer XB270HU
Submitted 25 Jun 2015 02:05 CEST, by 75.159.*.*
Camera model Canon EOS DIGITAL REBEL XSi
Processing remarks

Note: image file 1: suggested exposure time: 2.7 s (Set EV to +1.0)
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.17 cd/m2
Luminance spread 0.18 cd/m2 (2 standard deviations)
Exposure value –3.53 stops   (aim for –2 to –3)
Exposure spread 1.66 stops
Area used for calculation 0.404 x 0.455
Camera settings Exposure time: 1.3   ISO: 400   F-number: 3.5
Focal length: 29.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 216 cd/m2
Luminance spread 33 cd/m2 (2 standard deviations)
Exposure value –1.63 stops   (aim for –2 to –3)
Exposure spread 0.22 stops
Area used for calculation 0.404 x 0.455
Camera settings Exposure time: 1/128   ISO: 200   F-number: 3.5
Focal length: 29.1 mm   (35 mm equivalent)
Exposure compensation: 0
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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.