Contrast ratio results for DELL S2216HC

Contrast ratio 2:1
Monitor model DELL S2216HC
Submitted 08 Dec 2017 10:03 CET, by 27.62.*.*
Camera model Nikon D7200
Processing remarks

image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 1/11 s (Set EV to +1.9)
Warning: image file 2: camera was zoomed in too much.
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/18 s (Set EV to +2.1)
Warning: image file 3: camera was zoomed in too much.
image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 1/18 s (Set EV to +2.1)
Warning: Image F-number settings are not the same.
Warning: Image focal lengths/zoom levels are not the same.
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
Luminance 20 cd/m2
Luminance spread 97 cd/m2 (2 standard deviations)
Exposure value –4.41 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.932 x 1
Camera settings Exposure time: 1/40   ISO: 200   F-number: 5
Focal length: 67 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 43 cd/m2
Luminance spread 196 cd/m2 (2 standard deviations)
Exposure value –4.63 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 1 x 0.5
Camera settings Exposure time: 1/80   ISO: 200   F-number: 5.6
Focal length: 72 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 43 cd/m2
Luminance spread 196 cd/m2 (2 standard deviations)
Exposure value –4.63 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 1 x 0.5
Camera settings Exposure time: 1/80   ISO: 200   F-number: 5.6
Focal length: 72 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.