Contrast ratio results

Black
Contrast ratio	1:1
Monitor model
Submitted	05 Nov 2016 09:01 CET, by 108.78..
Camera model	oneplu A000
Processing remarks	Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Note: image file 1: suggested exposure time: 1/110 s (Set EV to -1.9) Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 2: Overexposed. Please decrease the shutter time. Note: image file 2: suggested exposure time: 1/150 s (Set EV to -2.4)
Screen photo	[open image]
Luminance	68 cd/m2
Luminance spread	2 cd/m2 (2 standard deviations)
Exposure value	–0.6 stops (aim for –2 to –3)
Exposure spread	0.04 stops
Area used for calculation	0.528 x 0.418
Camera settings	Exposure time: 1/30 ISO: 100 F-number: 2 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	93 cd/m2
Luminance spread	1 cd/m2 (2 standard deviations)
Exposure value	–0.14 stops (aim for –2 to –3)
Exposure spread	0.02 stops
Area used for calculation	0.528 x 0.443
Camera settings	Exposure time: 1/30 ISO: 100 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.