Contrast ratio results

Contrast ratio 5065:1
Monitor model
Submitted 23 Sep 2018 01:13 CEST, by 140.209.*.*
Camera model Nikon D40X
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 603.1 s (Set EV to +17.3)
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 1/8 s (Set EV to +7.7)

Black
Screen photo
Luminance 0.03 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –6.83 stops   (aim for –2 to –3)
Exposure spread 1.09 stops
Area used for calculation 0.959 x 1
Camera settings Exposure time: 30   ISO: 400   F-number: 22
Focal length: 69 mm   (35 mm equivalent)
Exposure compensation: 13
White
Screen photo
Luminance 154 cd/m2
Luminance spread 18 cd/m2 (2 standard deviations)
Exposure value –0.17 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 0.959 x 1
Camera settings Exposure time: 0.6   ISO: 400   F-number: 22
Focal length: 69 mm   (35 mm equivalent)
Exposure compensation: 10

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.