Contrast ratio results for DELL

Contrast ratio 4480:1
Monitor model DELL
Submitted 11 Dec 2021 16:33 CET, by 213.167.*.*
Camera model Sony ILCA-68
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 8.7 s (Set EV to +5.7)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
Luminance 0.04 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –8.2 stops   (aim for –2 to –3)
Exposure spread 2.29 stops
Area used for calculation 0.375 x 0.421
Camera settings Exposure time: 1/6   ISO: 400   F-number: 3.2
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 200 cd/m2
Luminance spread 47 cd/m2 (2 standard deviations)
Exposure value –2.81 stops   (aim for –2 to –3)
Exposure spread 0.34 stops
Area used for calculation 0.375 x 0.421
Camera settings Exposure time: 1/640   ISO: 400   F-number: 3.2
Focal length: 27 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.