Contrast ratio results

Contrast ratio 14811:1
Monitor model
Submitted 18 Jan 2021 16:28 CET, by 212.139.*.*
Camera model Sony ILCE-7M3
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 21.2 s (Set EV to +8.7)

Black
Screen photo
Luminance 0.01 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –11.23 stops   (aim for –2 to –3)
Exposure spread 0.9 stops
Area used for calculation 0.61 x 0.813
Camera settings Exposure time: 1/20   ISO: 400   F-number: 2.8
Focal length: 46 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 207 cd/m2
Luminance spread 32 cd/m2 (2 standard deviations)
Exposure value –0.69 stops   (aim for –2 to –3)
Exposure spread 0.22 stops
Area used for calculation 0.61 x 0.813
Camera settings Exposure time: 1/200   ISO: 400   F-number: 2.8
Focal length: 46 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.