Contrast ratio results

Black
Contrast ratio	8528:1
Monitor model
Submitted	27 May 2018 01:36 CEST, by 189.172..
Camera model	LGE Nexus 5X
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: 69.5 s (Set EV to +13.4) Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Note: image file 2: suggested exposure time: 1/490 s (Set EV to -1.6) Warning: Image ISO settings are not the same.
Screen photo	[open image]
Luminance	0.01 cd/m2
Luminance spread	0.23 cd/m2 (2 standard deviations)
Exposure value	–15.88 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.528 x 0.704
Camera settings	Exposure time: 1/153 ISO: 100 F-number: 2 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	74 cd/m2
Luminance spread	43 cd/m2 (2 standard deviations)
Exposure value	–0.89 stops (aim for –2 to –3)
Exposure spread	0.85 stops
Area used for calculation	0.528 x 0.704
Camera settings	Exposure time: 1/161 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.