Contrast ratio results for genereic tv

Contrast ratio 3817:1
Monitor model genereic tv
Submitted 01 Jul 2021 18:35 CEST, by 103.139.*.*
Camera model Sony ILCE-7M3
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: 10.2 s (Set EV to +3.3)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
Luminance 0.05 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –5.84 stops   (aim for –2 to –3)
Exposure spread 2.56 stops
Area used for calculation 0.347 x 0.391
Camera settings Exposure time: 1   ISO: 800   F-number: 5
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 177 cd/m2
Luminance spread 46 cd/m2 (2 standard deviations)
Exposure value –2.91 stops   (aim for –2 to –3)
Exposure spread 0.38 stops
Area used for calculation 0.347 x 0.391
Camera settings Exposure time: 1/500   ISO: 800   F-number: 5
Focal length: 25 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.