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Contrast ratio results for Acer ET241y

Contrast ratio 186:1
Monitor model Acer ET241y
Submitted 08 Nov 2018 17:15 CET, by 82.77.*.*
Camera model HUAWEI WAS-LX1
Processing remarks

Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Warning: image file 1: automatic white balance can cause inaccuracies.
image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Warning: using the flash makes no sense.
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Warning: image file 2: automatic white balance can cause inaccuracies.
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 593844 cd/m2
Luminance spread 8.72999e+06 cd/m2 (2 standard deviations)
Exposure value –7.77 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.346 x 0.456
Camera settings Exposure time: 1/99996336   ISO: 3200   F-number: 2.2
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 1.10352e+08 cd/m2
Luminance spread 1.7861e+08 cd/m2 (2 standard deviations)
Exposure value –2.91 stops   (aim for –2 to –3)
Exposure spread 3.25 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/99996336   ISO: 500   F-number: 2.2
Focal length: 26 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.