Contrast ratio results

Contrast ratio 734:1
Monitor model
Submitted 21 Oct 2021 02:48 CEST, by 89.95.*.*
Camera model Nikon D7200
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 9.8 s (Set EV to +3.3)
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/75 s (Set EV to +3.7)

Black
Screen photo
Luminance 0.05 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –4.79 stops   (aim for –2 to –3)
Exposure spread 1.96 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 2   ISO: 1250   F-number: 6.3
Focal length: 75 mm   (35 mm equivalent)
Exposure compensation: 1
White
Screen photo
Luminance 36 cd/m2
Luminance spread 42 cd/m2 (2 standard deviations)
Exposure value –5.23 stops   (aim for –2 to –3)
Exposure spread 1.9 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/500   ISO: 1250   F-number: 6.3
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.