Contrast ratio results for Acer One 10 S1003 Windows Tablet

Black
Contrast ratio	5:1
Monitor model	Acer One 10 S1003 Windows Tablet
Submitted	09 Jan 2018 05:32 CET, by 76.7..
Camera model	motorola Moto G 5S Plus
Processing remarks	Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Note: image file 1: suggested exposure time: 1/150 s (Set EV to +1.1) Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Screen photo	[open image]
Luminance	23 cd/m2
Luminance spread	13 cd/m2 (2 standard deviations)
Exposure value	–3.58 stops (aim for –2 to –3)
Exposure spread	0.82 stops
Area used for calculation	0.528 x 0.484
Camera settings	Exposure time: 1/321 ISO: 400 F-number: 2 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	113 cd/m2
Luminance spread	45 cd/m2 (2 standard deviations)
Exposure value	–1.28 stops (aim for –2 to –3)
Exposure spread	0.58 stops
Area used for calculation	0.528 x 0.484
Camera settings	Exposure time: 1/321 ISO: 400 F-number: 2 Focal length: 0 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.