Contrast ratio results for Acer One 10 S1003 Windows Tablet

Black
Contrast ratio	2061:1
Monitor model	Acer One 10 S1003 Windows Tablet
Submitted	09 Jan 2018 05:49 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). Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 1.3 s (Set EV to +2.4) Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: Image ISO settings are not the same.
Screen photo	[open image]
Luminance	0.06 cd/m2
Luminance spread	0.05 cd/m2 (2 standard deviations)
Exposure value	–4.92 stops (aim for –2 to –3)
Exposure spread	1.46 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/4 ISO: 800 F-number: 2 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	116 cd/m2
Luminance spread	35 cd/m2 (2 standard deviations)
Exposure value	–0.56 stops (aim for –2 to –3)
Exposure spread	0.44 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/200 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.