Contrast ratio results

Contrast ratio 3008:1
Monitor model
Submitted 23 Sep 2018 01:23 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: 696.7 s (Set EV to +4.5)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/4 s (Set EV to +1.8)

Black
Screen photo
Luminance 0.03 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –7.04 stops   (aim for –2 to –3)
Exposure spread 0.97 stops
Area used for calculation 0.876 x 0.981
Camera settings Exposure time: 30   ISO: 400   F-number: 22
Focal length: 63 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 79 cd/m2
Luminance spread 53 cd/m2 (2 standard deviations)
Exposure value –4.3 stops   (aim for –2 to –3)
Exposure spread 1.01 stops
Area used for calculation 0.876 x 0.981
Camera settings Exposure time: 1/15   ISO: 400   F-number: 22
Focal length: 63 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.