Contrast ratio results

Black
Contrast ratio	1:1
Monitor model
Submitted	24 Oct 2016 16:13 CEST, by 183.228..
Camera model	Nikon D3200
Processing remarks	Warning: image file 1: camera was zoomed in too much. Warning: image file 1: automatic white balance can cause inaccuracies. image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Note: image file 1: suggested exposure time: 1/200 s (Set EV to -2.3) Warning: image file 2: camera was zoomed in too much. 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. Note: image file 2: suggested exposure time: 1/200 s (Set EV to -2.3) Warning: image file 3: camera was zoomed in too much. Warning: image file 3: automatic white balance can cause inaccuracies. image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Note: image file 3: suggested exposure time: 1/200 s (Set EV to -2.3) Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?
Screen photo	[open image]
Luminance	1956 cd/m2
Luminance spread	1193 cd/m2 (2 standard deviations)
Exposure value	–1.16 stops (aim for –2 to –3)
Exposure spread	0.91 stops
Area used for calculation	1 x 0.52
Camera settings	Exposure time: 1/80 ISO: 100 F-number: 8 Focal length: 75 mm (35 mm equivalent) Exposure compensation: -1
White
Screen photo	[open image]
Luminance	1956 cd/m2
Luminance spread	1193 cd/m2 (2 standard deviations)
Exposure value	–1.16 stops (aim for –2 to –3)
Exposure spread	0.91 stops
Area used for calculation	1 x 0.52
Camera settings	Exposure time: 1/80 ISO: 100 F-number: 8 Focal length: 75 mm (35 mm equivalent) Exposure compensation: -1
Black at screen edge
Screen photo	[open image]
Luminance	1956 cd/m2
Luminance spread	1193 cd/m2 (2 standard deviations)
Exposure value	–1.16 stops (aim for –2 to –3)
Exposure spread	0.91 stops
Area used for calculation	1 x 0.52
Camera settings	Exposure time: 1/80 ISO: 100 F-number: 8 Focal length: 75 mm (35 mm equivalent) Exposure compensation: -1

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.