Contrast ratio results

Contrast ratio 792:1
Monitor model
Submitted 04 Aug 2022 22:40 CEST, by 77.171.*.*
Camera model samsung SM-A325F
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 1.0 s (Set EV to +5.7)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.

Black
Screen photo
Luminance 0.13 cd/m2
Luminance spread 0.25 cd/m2 (2 standard deviations)
Exposure value –8.18 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 1/50   ISO: 399   F-number: 1.9
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 106 cd/m2
Luminance spread 9 cd/m2 (2 standard deviations)
Exposure value –2.87 stops   (aim for –2 to –3)
Exposure spread 0.12 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 1/999   ISO: 399   F-number: 1.9
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.