Contrast ratio results

Black
Contrast ratio	26481:1
Monitor model
Submitted	22 Jun 2017 22:38 CEST, by 103.214..
Camera model	Nikon D7100
Processing remarks	Warning: image file 1: camera was zoomed in too much. Warning: image file 1: automatic white balance can cause inaccuracies. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 65.3 s (Set EV to +12.4) Warning: image file 2: camera was zoomed in too much. Warning: image file 2: automatic white balance can cause inaccuracies.
Screen photo	[open image]
Luminance	0.01 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–16.85 stops (aim for –2 to –3)
Exposure spread	1.33 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/320 ISO: 800 F-number: 5 Focal length: 157 mm (35 mm equivalent) Exposure compensation: -2
White
Screen photo	[open image]
Luminance	192 cd/m2
Luminance spread	81 cd/m2 (2 standard deviations)
Exposure value	–2.16 stops (aim for –2 to –3)
Exposure spread	0.62 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/320 ISO: 800 F-number: 5 Focal length: 157 mm (35 mm equivalent) Exposure compensation: -2

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.